Archive of Our Own ^beta

Chapter Text

It was no shock that Inko Midoriya was an omega. It was also no shock when Izuku’s secondary gender was developing at a far later pace in comparison to his class-mates, especially after his quirk developed so late it never came. Whilst children in Aldera skipped school with rushed notes containing excuses centered around ruts and heats, Izuku’s report card lacked a single absence, and even Katsuki  had a few. PSHE lessons on consent, courting, mating, pheromones, only left Izuku drowning in exorbitant bouts of humiliation and self-loathing, ruminating on how hard he’s lost the genetic lottery, how unlucky he is. 

He was showing no signs of presenting and his mama, apparently couldn’t tell by his burgeoning scent if he was an alpha or not, or perhaps she felt too guilty with the obvious answer. Izuku still isn’t really sure— regardless, she told him that if he hasn’t presented by his next birthday, they’ll take an over-due trip to the doctors.

Izuku hated the doctors. The smothering stale air which seemed to linger in any corridor, no matter how much ventilation was present; that scent laid thick in all nooks. The doctors had heavy bags under their eyes, black and exhausted, they were only one showcase of their fatigue. He hated how casually they told children, who dreamed to be heroes, that they ultimately were burdens to society. The last one may be a bit personal, but nonetheless, the point stood— doctors sat in a lower calibre than school assignments. They sat just above Pro Hero Endeavor, and that fact alone, spoke numbers.

The doctors led him to a room, Izuku was trying to hold in the tears that have been provoking his eyes since they entered the office. There were no onions for him to blame it on. The chairs were never comfortable, not particularly worn out, nor broken, they simply were unsatisfactory, too hard in some places, they didn’t provide the comfort a doctors office was meant to bring. 

Izuku’s mama was anxious, plagued with anxiety after their father left, despite her pleas and reassurances that his father leaving was not Izuku’s fault at all, he knew better. She never wanted him to get infatuated with heroes, she wanted his desire and yearning to stay as desire and yearning; nothing more. After all, it was better Izuku was quirkless, the dream of heroism, followed with inevitable injury and harm, unrealistic to him. A miniscule part of her was happy when he was diagnosed as quirkless, but he felt only anguish, the doctor’s face lacked emotion, an insipid expression seemingly plastered on it and Izuku wondered if he somehow cracked open and split the shell of a human, that doctors were, if it would be hollow.  

“Is it possible my baby could be an alpha , I understand he’s a late bloomer, but Izuku—”

She was interjected with a firm tut, the doctor was shaking his head in disapproval, her simple inquiry seeming almost humorous to him. 

“Its rather unlikely, his scent is faint, but it’s apparent, you’re an omega, so I’m surprised you didn’t catch it. It’s a rather sweet smell.” 

Izuku knew what that meant, he closed his eyes and his ears for the rest of the appointment, he didn’t want to see his mama’s desperate expression and he definitely didn’t want to hear the doctor’s information on what he should expect. 

He hasn’t presented yet, for all he knows, being an alpha was still a possibility— 

His logic was proven incorrect, as the same day, next week. He was writhing in agony from his heat, clutching the duvet with such force you’d think he was trying to rip a chunk of it out. Unsure of what to do, he ended up crawling out the room, naked, sweaty and dripping slick, to beg his mama to do anything . Thank God, he wasn’t in public, because Izuku thinks he would’ve begged the first alpha he saw, probably smelt, to knot him. 

Once he went back to school, for his last year at Aldera, he was an amateur when it came to understanding his own secondary gender in comparison to the other students. His scent lingered, leaking out in wafts when he didn’t want it to, his body was stubborn, his heats, each equally chaotic and strong; they left Izuku crying out in dissatisfaction even after he wrung what seemed like a billion orgasms out of himself. 

After a heat, the following school day, the bullying Katsuki(Izuku’s one sided, self-proclaimed rival), would inflict on him would be tenfold. Katsuki was like the epitome of luck, in the genetic lottery, he’s a jackpot on the first spin, a four leaf clover, you name it. But Izuku’s pitiful attempt to save that same sludge covered clover is what triggered the change in his fate. 

——

Izuku had to constantly miss work days due to his heat, the days spent lethargically, the omega hunched over, whining in pain as his stomach ripped itself apart. Sweet, sweet Katsuki, he’d try to help but Izuku’s omega was relentless, more stubborn than he already was. It demanded constant stimulation and Katsuki could only do too much, especially as he still had to attend shifts and patrolling. 

These missed days totalled over the month, he was generally doing less exercise and subsequently, it was no shock when his body seemed to…change, the lean muscle he had being coated by a thin layer of fat, his thighs— once low in fat and high in muscle— though they maintained the amount of muscle, they were softer, a bit larger. None of this went unnoticed to Izuku nor Katsuki, the blonde would spend more time coaxing Izuku into removing his shirt. Katsuki’s compliments ricochetted off of him, leaving Izuku feeling irrationally insecure.

Katsuki praised these changes, encouraging them with equanimity, it was almost as if he liked them. Izuku shook his head. That was impossible. 

Even outside the bedroom, Izuku had other issues. He wanted to fight more, there were still so many unprotected citizens getting harmed daily, Izuku wanted to help them. He wanted to uplift the unfortunate, offering peace. How could he do that in this woeful state? It was shameful.

“Izuku we have that stupid hero conference to attend to.” Katsuki reminded him, shuffling into his hero costume more. “Why did you even sign me up to that bullshit?”

Izuku was hunched over the bed, and even though they just finished having sex, Katsuki did not rock his world that hard. The younger boy was clutching his stomach, he looked sickly, his skin was pale and the tone brought a wave of apprehension upon Katsuki. The smell was getting more intense, blanketing the room in a pleasant, indecipherable scent that neither Katsuki nor Izuku could ever label; it was sweet, that was certain, almost powdery and light, it wafted around the house unnoticed unless Izuku was about to be tossed into the throes of his heat. 

“Izuku?”—no response,—“Izuku..baby, talk to me.” He commanded, if you could even call it that with the bouts of concern which laced each word. Izuku let out a choked groan, and Katsuki was at his side. Katsuki dug his nose into the crook of his neck, taking a deep inhale. His scent has gotten much stronger, Midoriya seemed to get a hold of himself, the back of his palm swiftly grazing his forehead stripping the beads of sweat off of their surface. 

Katsuki— mate…our mate— no, Katsuki was worried. Izuku caught himself as well as he could muster, he could feel his stomach churning, trying to swallow itself in, he grit his teeth together as he panted. When did it get so hot? He couldn’t tell you. Hell, he forgot to answer Katsuki. 

“Not doing good, heats coming quicker than I expected.” 

“You’re not going to that conference, stay home okay Izuku.”

—He nodded, letting out another pained whine, which had Katsuki’s eyes widening. 

“Fuck i’ll stay home too—”

“No Kacchan, one of us has to attend, it’s important.” He said, ignoring the spike of pain in his abdomen, Kacchan had to do this. 

“Izuku.” 

“No Kacchan, you go, I'll be fine here, I've had plenty heats without you.” 

Katsuki let out a sigh in acquiescence, arguing with Izuku was futile, especially when he was already in pain. If he wanted Katsuki to do something, then that’s what Katsuki will do, without question. He nodded. 

The conference was different. Which is why Katsuki was initially so adamant of Izuku attending. It wasn’t a normal hero meeting, where random men, all of which Katsuki had no prior insight or knowledge of their names nor backgrounds, would be welcomed(against his will) to talk and describe issues in the town that they believed the heroes were lacking in improving. This was more practical, more fun. Instead of these random men, who will explain the same banal issues repeatedly while offering as much solution as a beach offering shade, they invited Hatsume Mei. She’d showcase all her newest ‘babies’, none properly tested, all prototypes,, encouraging heroes to try them, in return the heroes will offer insight and improvements, like a positive cycle. 

Izuku would’ve loved this, he’d make sure to take a few recordings and pictures. 

“Bro,”— he didn’t even have to turn around to know who it was.

—“Hey man, nice seeing you, where’s your other half?” 

He asked, and Katsuki grunted, to his chagrin, the idiots still label Izuku as his ‘other half’, a humiliating reminder of when Katsuki screamed his confession to the omega during their second year at UA, that was almost 7 years ago, and still, It’s brought up everytime Katsuki meets up with these dumbasses.

“He’s at home, heats going to start.”  

Kaminari, who was eavesdropping, popped out from his refuge, “He’s in heat?” He rhetorically asked and Katsuki immediately knew he’d rather the lightning-user had stayed silent, “That means you’re in for a treat tonight Kacchan.” Katsuki grabbed his head, exploding him with a force that would have you wondering how he didn’t break through the floor boards. 

Kirishima and Katsuki continued their stroll into the conference room whilst Jirou, the poor— poor inauspicious soul, went to deal with Kaminari; whose arms were plying in circles, as he babbled nonsensically.

Hatsume was on the stage, looking elated and far too enthusiastic for any sort of conference. 

She loved this kind of thing, even in their UA days, over half a decade ago, she relished in her ‘babies’. Her intricate inventions, blueprints created with such precise accuracy, being able to stand amongst some of the finest hero tech inventors. Apparently some people even compare her to Dave, Katsuki disagrees but the point is there nonetheless— she has real talent.

Kirishima sat next to him and others filtered in overtime. Katsuki shared moments with his old classmates, despite still seeing them pretty frequently. 

He even shared a word with All Might, ignoring the persistent ache, which reminded him that Izuku, All Might's second biggest fan(after himself), wasn’t present in this conference. 

Time went on, the room darkened, and friends shared hushed curious whispers— Katsuki didn’t, although silently listening into the other dumbasses' conversations was never as bad as he made it out to be. Sero finally entered alongside Sato, despite Soy face constantly ‘keeping him in check’ and Sato being a newer addition to the group, they’re objectively far less insufferable than the others, so Katsuki much rather stick with them when he wasn’t with Izuku.

The curtains pulled apart, separating; however whatever, or whoever laid on the other side was still kept inconspicuous, the whispers died down, everyone, admittedly including Katsuki, were far too entranced to focus on their conversations. That famous circular light graced the stage and Hatsume stood confidently in the centre of it.

“Hello, heroes, it’s a bigger crowd than usual today!” 

She exclaimed, her excitement was over-flowing like a broken piggy-bank, Katsuki scowled because yes, far more people attended this ceremony than normal, but it didn’t feel half as satisfying as when Izuku was there beside him. The lot of people didn’t amaze him, instead it made the room feel suffocating, like the air was being used up too fast due to the mass gathering of people. He found himself thinking of Izuku, as he always did, he means, that’s his husband after all. Izuku would probably keep nudging Katsuki’s arm, a sheepish grin stretched on his face, the excitement would make him talk too loud, too fast, causing people to turn and sneak glances at them, Katsuki would tell the nerd to ‘shut up’, and Izuku would be too shamelessly happy to listen. 

He caught himself smiling and quickly scowled again. Hatsume looked around at the crowd, her eyes lingering around Katsuki for a while before her cheerfulness faltered. Guess she was in a similar boat to him. Regardless, she swallowed it down better than Katsuki, who was already getting irritated without Izuku. She put her smile on and pushed forward. 

He thought of taking his phone out and recording a little for Izuku, that way, when he arrived home they could watch it all together and Katsuki could act like he didn’t watch it already whilst Izuku gasps at every sophisticated gadget. But there were loads of others sitting behind him, it would be a huge dick move to whip out his camera and potentially ruin their nights.

Oh yes— the heat. Izuku’s in heat, he’s probably writhing in pain now after turning their entire bedroom into his nest. Katsuki may need to buy new clothes, especially his spare hero costume. Izuku always ripped that one or got his body fluids all over it, rendering it useless. The

point was: Izuku was in pain, maybe agony, so Katsuki couldn’t give half a fuck if he’s labelled as a dick, hell, he’s always been seen as a brat, he’ll ruin all their nights if it ensures Izuku could watch the conference. 

Before he knew it, the first gadget was rolling out, the curtains fully drawn as that circular light was accompanied by many other stage lights, the room illuminated in hues of yellows as the crowd roared. 

“Don’t look so down dude, I’m sure he’s okay.” Kirishima nudged him, Katsuki only grunted in acknowledgment. God when did he depend on that nerd so much? Get yourself together, Katsuki. 

“I know.” 

“Don’t worry man, if he needed you he’d call.” 

Stupid Kirishima and his stupid ability to read his face. Katsuki wasn’t worrying, and hypothetically, if he were to be, it shouldn’t be apparent. 

The first gadget was quite small, a far more simple device in comparison to what Katsuki expected after viewing the last conference’s display. It seemed to be more proficient in stealth missions, a clear small box-like storage container. She began her long speech on this seemingly useless device’s abilities. Apparently it could trap an object inside of it, the clear-looking medium could reflect light, making the trapped object appear invisible. Heroes like Invisible Girl keened, and Katsuki even saw President Mic nudging Aizawa. However, for heroes like him or Izuku, whose presences are always exemplified by their quirk, a stealth item wasn’t much help. 

In the end Aizawa got it but gifted the gadget to Hagakure, Katsuki thinks he just wanted to look generous in front of his husband— or maybe Katsuki was just jealous his own wasn’t currently there. 

The next devices went by, Katsuki was lucky enough to get one for himself, a little extra compartment to add to his hero costume, that way he could store more concentrated sweat into a separate area for usage in more intensive, difficult battles. 

More devices passed and Katsuki was no longer bothering to hide his annoyance, he responded to each device more perfunctory than the last, he wanted his husband, is that so wrong? 

The first lot of combat-supporting items finally passed when Hatsume announced an encore. 

“Omegas in the hero society are not uncommon; however, such a small percentage of the hero research and development funding goes into supporting and enhancing the durability of omega heroes.”

Katsuki’s interest was piqued. 

It was true, support for omega heroes was massively underfunded, whilst an exorbitant percentage went towards aiding alphas in pre-rut and ensuring that alphas were not affected by other heroes' pheromones, omegas didn’t have that privilege despite their general senses being more enhanced. In the past omegas were expected to simply stay home during heat and cope with the deliberating pain, like Izuku was doing right now— being a ‘perfect, obedient’ mate. Omegas were only able to be qualified heroes a few decades ago. It was bullshit, the entire society of heroes were aware of this, however despite mountains of complaints, the government consistently failed to address the oppression.

She talked on— 

“I’m not an omega, however I was blessed with the opportunity to be surrounded by many in the hero course, during my time at UA.” — her eyes lingered on a few omegas in the room. 

“This year the supporting staff gave 71 percent of our funding towards omega support gadgets.” 

There was a loud round of applause, even Katsuki showed the most enthusiasm he has since the conference started. 

The first gadget came out, it was far smaller than anything previously presented. 

“This one is definitely not something to foolishly play with, it’s an untested prototype of a mechanical drug, it aims to alleviate the intensity of heat, we’re hoping that if this works an omega could do hero work, with minimal discomfort, while they’re in their heat. Unfortunately, for this to work the omega would need a mate, as the drug targets the shared bond, exuding an artificial pheromone, which inhibits the increase in heat inducing pheromones..” 

Katsuki wasn’t certain of the rest of this drug’s abilities. He decided to get it as soon as she said the first part, he didn’t care about whatever else may happen, if it ensured Izuku could perform at his peak ability during this heat. If it meant the omega wouldn’t have to be clutching his stomach, taking suppressant after suppressant despite knowing it wouldn’t diminish the agony.

Izuku deserved to be a hero more than anyone, he was the epitome of selflessness, the embodiment of heroic. Izuku gave Katsuki One For All once during their battle with Nine, and then he lost One for All, and Katsuki saw his entire world end, he hid it well, Izuku should’ve been praised more, he deserved to be written into history, 

Katsuki knows that’s not what Izuku wanted, he's aware of it. Izuku was perfectly content just staying behind the lines, in the shadows, praising his hero companions, but Katsuki also knows that’s not completely true. Izuku’s made to be a hero, he deserves to be in the limelight. When Izuku lost his quirk, he’d still fan-boy over All-Might, he’d still watch the news and have quiet jubilations for their classmates' success, his eyes would be filled with admiration, but Katsuki could see longing in those green irises; he saw desperation and yearning— but not for what he could never have, for what he once had. For what was stripped away from him too early. 

Funding the costume was the least of his issues, well, honestly, it was a large one, but Katsuki didn’t regret a second of it, it would all be worth it if he could see that victorious grin. He’ll make sure Izuku spends all his life smiling like that. 

His hand shot up and he could feel Kirishima's eyes on him, he could imagine the lopsided, knowing smile on his face, he didn’t care, he was going to get this. 

The crowd cheered, praising his selflessness, it was stupid, their claps and supportive whistles were stupid. Izuku was more generous than this every single fucking day, every thought he had, every move he acted all came from his selflessness. All of it. He deserved this praise and Katsuki will ensure he gets it. 

Hatsume was shocked, well she appeared to be, but Katsuki could see behind that visage, when she began this speech and looked around the room, empowering the omegas amongst them, her eyes skimmed the crowd around Katsuki, she searched for Izuku again- perhaps she was hoping he’d arrive a bit later, Katsuki looked back at her and she must’ve been able to read his eyes. She wasn’t shocked, she knew he’d do this, that didn’t stop her from exclaiming: ‘Pro hero Dynamight wants it?!’, to which the crowd’s booming intensified. 

He kept his arm raised as high as it could go, like he was trying to reach up to heaven, clutch one of the fate deciding stars and force them to change Izuku’s inauspiciousness. Hatsume got a drone to fly the gadget over to Katsuki, the small box drifting down, attached to the spinning device, down onto his palms. He clutched it, not sparing the intricate details any more attention beside what he could feel, as he pocketed it. Over time the crowd died down whilst Kirishima’s taunting jabs lingered, Katsuki paid the other gadgets and mechanical devices no mind, his curiosity had already been quenched, he just had to sit here and wait until this damn show finished. 

——

Electricity seemed to zap through his limbs on his way home, Katsuki was fidgety, anytime he’d rest his body, he’d get restless leg syndrome, something was aching in him, and he knows it’s due to Izuku’s current state, if he’s this affected by Izuku’s heat he cannot even imagine what the omega is currently experiencing. His heel drummed against the ground, he felt like a shaken soda bottle and any minor inconvenience was going to explode his lid off. 

The car was too hot, the seats seemed to have an uncomfortable incline which Katsuki had never noticed before. He was sweating more than usual, and Katsuki sweat a lot. The sweat made his skin slick and leathery, he despised the texture. Full attention on the road felt unattainable, some obscure dream too far of reach to Katsuki, he could fathom focussing for a few seconds, the packed road, the cars lined up like unfallen dominoes. After those thoughts passed, his mind would wonder, concerns about Izuku infiltrated as they always did. Trying to completely concentrate on anything, beside him, was futile.

Home was in sight, Katsuki wished he was riding shotgun, able to spend the entire journey staring out the window aimlessly, it would be alright when he lost focus, nobody depended on him after all. Katsuki worried too much over everything Izuku centered, after he lost his quirk, put his life on the line for the country. Hell, despite not even getting half the praise he deserved, Izuku still risked his life everyday.

He slammed the car door shut, his skin felt prickly, twinging with indescribable pain, well, not pain, an ache, as he said, was probably a better way to describe it, almost like phantom pain. Usually during Izuku’s heats Katsuki might get mild discomfort, a small twinge or a little prick on his body, Izuku’s heat must’ve been worse than usual. 

The scent was overwhelming, Katsuki’s eyes twitched as he almost reached to cover his nose, it would be bad if his rut got triggered, he pushed down his invasive alpha, his body felt weakened, his visceral instincts were battling with the rational part of his body. He knew one thing: he couldn’t let them win. The scent rushed out the door, any outlet; it travelled through it, and thank God him and Izuku don’t live in a highly populated neighbourhood because they’d have immediately sniffed him out. Izuku seemed to notice Katsuki came out, the blonde only had a second to long the door, before the omega was trudging down the stairs. 

“Kacchan?” He said from afar, the sweet scent was amplified every step. 

“Izuku, hey baby stop.” He coaxed him, walking faster, basically running, so he could reach Izuku before the omega hurt himself. He found him swaying on the stairs, stark naked, Izuku’s eyes were glazed with some pleasure and more pain, he was about to take another step when Katsuki lifted him up. 

“Kacchan..you’re finally back, you can still hold me.” He said, and Katsuki hated the insecure thought, he lifted Izuku’s higher up with ease.

“You’re so fucking perfect Izuku.”

He ignored the slick which began to pool up on his hero costume, making a damp, slippery patch on the garment. Izuku seemed to pay the wet material no mind as he began to grind down onto Katsuki, whining as he took deep breaths into his neck, taking in Katsuki’s smoky scent.

“Come on Izuku, let’s get you in bed.” Katsuki went up the stairs, Izuku letting out lewd, high pitched pants of desperation every step as his hard cock rubbed against Katsuki’s covered abdomen. 

Izuku was flushed, well he was in heat so that was a given, he was still physically pained, less so, now that Katsuki, his mate, has arrived, but still in pain nonetheless. 

Their bedroom was a state. Izuku had turned the entire place into his nest, the curtains were drawn shut, letting in minimal light, enclosing the room in a grey glow, magazine shots of Katsuki had been teared out their places, most had streaks of cum, slick or spit over them, Katsuki’s official figurines were in a similar shape. The All-might pillows that Katsuki had scented for Izuku were thrown haphazardly around the room, the smell faded off of them, a few pillows had deep marks ingrained into their anatomy, probably from Izuku’s frustration at his own insatiability. Katsuki even had to stifle his laughter when he saw a fan-made Dynamight themed dildo broken in the corner of the room, reminding himself that he cannot upset the omega any more than his absence already has.

“Kacchan..fuck me already, it fucking hurts .” Izuku groaned out. His change in language and personality was always a pleasant shock to Katsuki whenever Izuku went into heat. After the heat, they always have fun talking about the degrading things Izuku would mindlessly spew; how the soft, selfless ‘cinnamon roll’—a phrase that made them both gag— turned into some sort of demanding tyrant.  

It was so hard to not press right into Izuku then and there, the omega whimpering as he got onto his hands and knees, arching so he was presenting perfectly for Katsuki. The alpha’s mouth went dry, his heart beat picking up, thumping heavily in his chest as it always did when he looked at Izuku. Fuck, he wasn’t going to last.. No matter how many times Katsuki has seen Izuku bare he was always filled with the same giddy nervousness, every curve of him was perfection, Izuku was blessed with sublime beauty from his head to heel. Izuku was worthy of worship and Katsuki wanted to be worthy enough to worship him.

He discarded his hero costume far less swiftly than ideally, his hands slightly trembling from adrenaline as they fidgeted with all the different gears and components of his costume. Izuku snapped at him to ‘get on with it’, as Katsuki stripped down. The blonde stepped out the garments, pulling his briefs down and letting out a breathy sigh of relief as his hard cock sprang out. 

Izuku’s eyes raked down his body like the omega was going to eat him whole, use his body until Katsuki was drained, even then, he wouldn’t stop— Katsuki knew that well, Izuku’s eyes didn’t leave, they trailed further down, fixated on his heavy cock, a pleased smile blessed his face and fuck..Katsuki wanted to see that face panting his name, shouting it out as he orgasmed. 

Not yet.  

He reminded himself again, grounding his alpha again, he reached into their nightstand, which also, somehow, had cum on it. He pulled out a condom, lube wasn’t needed as Izuku was definitely wet enough, the slick soaking their bed more than it already had, Katsuki will change it while Izuku’s asleep.  

The packet crinkled in his sweaty palms, Katsuki’s fingers were suddenly inept, and Izuku let out a growl. 

“No condom, want to feel you raw.”

“Izuku, we can’t risk—”

“I’m not stupid Kacchan.I said no.” 

The condom got returned to the nightstand, Katsuki will not defy Izuku after all, he came back to his feverish mate, mounting Izuku and pressing his stomach onto the omega’s back, so they were as close as physically possible. Izuku finally shut up, gasping, before the noise turned into a drawn out moan once Katsuki began to rub his shaft against the loosened, puckered hole. 

“Kacchan, push in already, fucking tease— Ah mmm…oh fuck me.” His demand was smoothed out, turning into a series of breathy moans as Katsuki finally pressed in. It felt sublime, the sensation overwhelming Izuku, he’d waited so long for this, so long..His hole was stretched wide, the burn, that deep stretch, oh it felt so fucking good. Izuku’s arms scrambled to hold onto anything, eventually finding the wet mattress under him as adequate, his fingers digging into the foam, knitting around it as the omega moaned out in bliss.

Katsuki’s fingers made their way around Izuku’s waist, holding the plump flesh as he stabilised the omega’s trembling body, holding him down in place as he slammed forward over and over again. 

“Kacchan..kacchan— S-so big— fuck..splitting me in half.” He moaned out, and it did feel like that, like every nerve, cell, organ which coalesced to form Izuku’s anatomy was being stimulated simultaneously, he could do nothing but take it, he wanted to do nothing but take the relentless pounding. His toes curled in pleasure, his back following its lead, arching more than it was, he craned his neck back, “Harder, fuck me harder Kacchan.” and he thought the blonde didn’t hear him until Izuku’s prostate got slammed into with such force the omega’s body shook, legs giving out as he slumped, mouth wide as his pleasure poured out of it like a broken faucet, he couldn’t be fixed, didn’t want to be, perfectly content laying down and taking his mate’s thick cock. 

——

Izuku’s eyes opened, he wanted to sleep more but his body begged him to get up. The mattress wasn’t drenched in cum and slick nor were the pillows tossed haphazardly on the floor. Izuku could feel his stomach, it was all full with cum, Izuku couldn’t even remember how many loads he squeezed out of Katsuki, the alpha probably knotted him at least 12 times and even with the plug in, some stray dribbles forced their way out. Regardless, Izuku’s heat was satisfied, 

he’ll probably start feeling the guilt later. 

Katsuki entered the room, holding a steaming bowl of Katsudon. Izuku’s eyes literally had hearts in them as he drooled. During a heat, more often than not, the omega would hardly eat anything, or they’d only eat enough to stay conscious. Izuku was no different, during heat his body put all the energy into the potential chance of breeding, and preparing his body for that, thus, he’s normally left incredibly fatigued and sluggish after one. The smell alone made Izuku want to drop to his knees and praise Katsuki, unfortunately he lacked the energy to do so, instead he looked up at the blonde and smiled. 

“Thank you Kacchan, you’ve always been a great chef.” He smiled, but then his heat dawned on him, as it always did after, the way he rode Katsuki, calling the alpha his ‘dildo’ while Katsuki just groaned, half-awake under him. Katsuki was about to tease him about it but Izuku was already screaming out a rushed apology, “Kacchan! I’m so sorry,” He paused to take a huge mouthful of katsudon, before his tongue got burnt and he almost dropped the bowl onto himself, “I’m sorry! I was horrible to you…you aren’t just a sex toy to me, you’ve never been just an outlet for sex, Kacchan I really love you and I was just in the throes of my—”

Katsuki interjected with unrestrained laughter.

“You’re mumbling Izuku, we have this conversation after all your heats, I don’t mind at all, trust me, just relax.” He reassured him, giving the omega a quick peck on the lips as he moved the bowl of katsudon to the bedside table. 

Izuku nodded slowly, he just felt so bad..Katsuki was— he.. 

“You worry too much, it’s all good Izuku, I enjoyed every second.” He comforted him again. 

“Really, Kacchan?” 

“Yes, even when you told me that ‘my role was to shut up and just stay hard’.” He chuckled and Izuku felt as if all his blood had just rushed up to his face, and maybe that feeling was plausible, especially with how red his face was. Before he could squeal out another apology Katsuki wrapped his arms around him, enclosing Izuku in warmth alongside the physical reassurance, it felt nice, safe and comfortable. Izuku didn’t apologize, instead he shuffled into the touch, letting himself be held as there is no need to apologise when he knows Katsuki will always forgive him. 

The day passed by as it usually did after Izuku’s heat, Katsuki gave him a shower as not only did he feel all mucky and gross after his heat, the cum inside of him only exemplified that feeling and he was still too lethargic to wash himself. The alpha’s hands were always soft, unlike Katsuki’s body, which was hard muscle and only plush in a few places, like his chest and ass, both in the running of Izuku’s favourite areas to grab, Katsuki’s palms were soft and more sweaty than one would expect. It was unbeknownst to him how Katsuki didn’t accidentally detonate a self-made nuclear bomb whenever he’d cook, Kastuki’s sweat and fire seems to be an explosive war in Izuku’s mind, even more so after Katsuki bragged about his and Todoroki’s team attack on the I-Island. 

His hands were soft on Izuku’s body as he washed him down, they weren’t driven by lust running smoothly over his skin. Izuku initially tried to say he’d be fine showering himself, his body wasn’t like Katsuki’s anymore he lacked muscle in the right places, he had chub in the wrong ones, Katsuki reassured him though, he shouted angry compliments at Izuku about how his body is ‘fucking sexy’ and how it’s ‘perfect’ and how he ‘wouldn’t change a thing’ and Izuku believed him; of course he did, because Katsuki didn’t lie, but he couldn’t shake the slither of doubt away, he felt guilty, for potentially accussing Katsuki of lying, and for being insecure in his self. Isn’t that ludicrous, feeling guilty for your own emotions?

Izuku got lunch served to him, followed by another serving, which Katsuki forced him to have, deeming Izuku as ‘still hungry’ based on how fast he ate the first serving. Then he was served dinner, Katsuki asked what he wanted, to which he gave a vague answer showing a general acceptance to anything. The alpha responded by making a plate containing little portions of multiple different meals, Izuku keened, throwing himself onto the blonde in a tight appreciative hug, he just brushed it off, trying to appear nonchalant, too bad he couldn’t brush the red off his cheeks though. 

And finally now, after 2 straight hours of watching ‘the top 3 All Might rescues in each of his ages, they could both finally rest. 

——

“Izuku, I recorded the conference for you.” Katsuki simply said, making the bed as the omega changed into his pyjamas. 

“How was it?” He scraped his shirt, throwing it off as the idea of one on his body, alongside the heat of the blanket that’ll be over him sounded hellish, “Heard you got something.” 

Katsuki stopped making the bed, honestly it was stupid, what was the point of making the bed just for them to go in it again?

“Yeah two things, one is an extra pocket for my costume, the others a drug so you could work during your heats.” 

Izuku piqued up immediately, his head snapping to Katsuki in a manner comparable to an owl.

“What?!” He squeaked out incredulously, staring at Katsuki as if he just announced that All Might was going to be living with them. He continued staring at him, waiting for some sort of punchline, for a loud laugh of disbelief from Katsuki, because of the priceless expression on his face. 

Neither came. Instead Katsuki tutted, clicking his tongue. 

“I’m not joking Izuku, he walked to their desk, which Katsuki’s hero costume had been slung over lazily when Izuku was in the throes of his heat. He checked a compartment of it, pulling out a little box and tossing it over to Izuku. “See for yourself.”

Izuku caught it perfectly, for one of Hatsume’s gadgets it was rather small. 

“And this should get rid of my heats?” He eyed it skeptically, “How?” 

“Something about it targeting our bond, it should create a chemical which inhibits the secretion of the heat inducing pheromones-”

“So the symptoms of the heat will be kept to a minimum as the pheromone which intensifies it is restrained..How smart, Hatsume has always been so intelligent, I wonder what the chemical is, I wonder if she even knows what it is— Better question..what’s her IQ? Um— she probably doesn’t know that one either….I know maybe we should-”

“Izuku, the muttering.” Katsuki carefully interjected, “It’s not something we have to do, we could always throw it in the bin and forget its existence.”

Izuku nodded anxiously at that, banishing the thought of such an— unorthodox drug from his mind. Then Katsuki nodded in understanding, putting the box into a random container under their bed where it’ll surely be forgotten about.

“It’s just hard to trust things like that, maybe because my heat only ended so recently but my head is telling me not to.” It was Katsuki's turn to nod as he slid under the duvet. Katsuki would’ve wrapped his arms around Izuku but more often than not, the omega didn’t really want to cuddle, it especially felt futile when Izuku moved around so much throughout the night, and Katsuki’s excessive sweating was a tiny bit—not like Izuku would admit it—annoying. Even with the window fully open, on a cold winter day, the blonde would sweat as if he was in a sauna. Izuku doesn’t mind it, he tries not to mind it at least, but they weren’t immature UA students who had to hide their feelings and opinions, they were married adults, therefore Izuku was far more open in his likes and dislikes. If he didn’t like something, he would tell Katsuki.

He sighed out contently, letting his fatigue drown his body. 

—

Months passed in a blink of an eye, as always, Katsuki and Izuku were fighting for the third place on the podium, Shouto maintained second place with Mirio on top. 

They loved their battles, perhaps for different reasons, with Katsuki liking to compete alongside Izuku, and Izuku loving to save people, especially ‘helpless’ people, similar to how he used to be. He loved offering hope for them, while ensuring peace in Japan. 

Izuku’s heat was crawling up on him again. He suddenly felt the need to start building his nest again, he built it, then tore it apart, then built it again, just to tear it apart. The omega could feel the mating bond boring its way through his neck, it was sore, occasionally it ached, begging for Katsuki’s lips on it, to bite into the firm flesh and reclaim Izuku. The pain was easily ignored, although Izuku did notice Katsuki’s gaze lingering on him more than usual. 

With his hero work he was on a streak! He felt good about himself, saving people when they thought all was lost, and inspiring others to be more resilient, that’s why he loved being a hero. His body was shaping up again too, his muscles were coming back in the right places, the stomach fat was finally leaving too, he just felt confident in his body.

But Katsuki’s gazes, his troubled glances didn’t go unnoticed. When he looked at Izuku, the omega had to refrain himself from comforting Katsuki. He wasn’t sure where this feeling came from, Katsuki wasn’t outwardly calling out for any sort of help, or negative attention. But his eyes looked so woeful, they held sorrow like rain clouds, full and dire. Although his foul mouth stuck and his eye brows still furrowed with misplaced anger, behind that facade was misery.

“Izuku, come here, you’ve been out all day y’know that?”

“I know Kacchan, but people need us okay, I need to save as many people now because in a week—”

Katsuki slammed his hands down on the table, before taking a deep breath, he mumbled something which was incoherent to Izuku’s ears. Izuku watched as Katsuki got two pairs of chopsticks, before putting them into hot bowls or ramen, Izuku's heart was still thumping from the loud slam, he thanked Katsuki for the food, apologizing for being absent so much. The blonde stayed silent, as if he was mentally conflicted in some decision. Izuku grabbed the bowl from his distracted, loosened hands. With the assumption that Katsuki wasn’t in the mood to cuddle by the television and criticise people's mischaracterisation of All Might, Izuku turned to leave. 

“Izuku..” Katsuki whispered, this time his ear caught it. It sounded so soft, so unlike the version of Katsuki which the alpha tried to present himself as, almost like how Katsuki spoke to him in the hospital after the war, like how he sounded that time Izuku became a vigilante and it took Katsuki’s apology to bring him back. 

He stopped walking. Of course he stopped walking. Only now when he turned to face Katsuki could he see the small bags which burdened his eyes, Izuku hadn't noticed it. 

“Kacchan?” He went closer. How did he miss it? Katsuki’s hands were trembling by his sides. 

Katsuki must’ve caught his stare as he balled his fists up. 

“Izuku, I'm”—His face scrunched up as he found the words—“I’m concerned about you, your heats coming up in a week and you’re not preparing at all, you’re ignoring yourself, your needs.” He finished and Izuku wasn’t expecting that. The shock took the words out his mouth, he felt winded without any rational, physical reasoning. Suddenly, all he felt was guilt. 

He upset Kacchan…he upset Kacchan…he—

Katsuki didn't seem to be finished, 

“You’re too kind Izuku, you don’t owe anyone anything, not even me.” He finished with, and Izuku couldn’t speak, he didn’t have to because Katsuki was walking towards him, he was touching Izuku’s hair, comforting him exactly how he liked to be comforted. The alpha’s arms wrapped around him and Izuku didn’t mind the sweat at all, it didn’t stop him from burying his face deeper into Katsuki’s neck, breathing him in how his instincts told him to. 

His quirk was hardly his own, Izuku made it into his own quirk, but it’s not the same. He wasn’t born with it, it hardly holds any connection to his ancestors like quirks(which are usually somewhat inherited)are meant to. He was an outlier, an anomaly within society, yet amongst over a hundred million people in Japan, the majority having strength Izuku couldn’t even imagine. All might chose him, a quirkless omega. 

Similar to Kacchan and the rest of their class, who put their money towards Izuku’s new hero suit, so he could still fight alongside them on the field.

Izuku owed them everything, he needed to keep fighting, as long as there were quirks, they’ll be villains, and as long as villains are hurting people, we’ll need the heroes to help. So many people helped Izuku get where he was now, Katsuki the most. Saying he didn’t owe them anything? It was hysterical wasn't it? 

The arms around him squeezed tighter, they were like walls, enclosing his body in their structure, leaving Izuku warm and safe. Those same walls trembled, but for now Izuku will find comfort in their poor architecture. 

“You..you’re hurting yourself Izuku..have you even been eating?” Katsuki mumbled, his voice cracked—the same walls crumbling down as Katsuki wiped at his sullen eyes, “you know there’s food here…I made Katsudon a few nights ago, but it gone off before you came home.” He babbled, wiping stray tears away.

Katsuki was always like that, he’d hold his feelings in, locking the taboo emotions up in the back of his mind. Then he’d get more irritable, more annoyed until it spilt out; his emotions bursting out of him in vehement pools. 

Izuku finally made a noise, he laughed dryly, his own shaky palms going to hold Katsuki’s. He hated when Katsuki cried. He hated how his lashes clumped up due to the tears, how his eyes were left red and puffy, he hated how he sniffed loudly and how he seemed to get frozen in place, his own emotions taunting him. 

“I’m sorry Kacchan, I'm sorry I didn’t notice.” Izuku said, going on his tiptoes slightly so he could press a kiss against Katsuki’s forehead, pressing another soft one against his temple. Katsuki’s fingers wrapped around the cloth of Izuku’s costume, a silent plea, and Izuku vowed to never upset him again. 

They stayed like that for a while longer until Katsuki was yawning and rubbing at his eyes. Both their legs hurt from standing in the same place for so long, Izuku’s joints clicking once he finally stretched out. 

That night Izuku couldn’t sleep much. Whilst Katsuki snored lightly beside him, Izuku found himself to be burdened by an exorbitant amount of mental turmoil. That box was still there, unused, yes, but forgotten about, not at all. Katsuki got it to be kind, he thought of Izuku and Izuku’s future, deciding this would have a positive impact on it. 

As expected, the box was still in the same container, it’s been months since Katsuki had put it back, Izuku never had a proper time to scrutinise it. The details were immaculate, on just the cover, Hatsume really was a prodigy. This would solve the cause of his and Katsuki’s disagreement wouldn't it? Even now Izuku felt as if his heat could come early, it was creeping up on him and Katsuki was right; he’s been neglecting himself, but that was only because his heat leaves him out of work for far too many days every year. 

Izuku cringed as his stomach cramped, he didn’t want to stop his hero work yet. The box was tempting him, Izuku began to wonder how different life was for alphas, that’s similar to how Katsuki’s like isn't it? If Izuku did this then he could understand Katsuki even deeper, he could relate. His hand teased the cover of the box, running lengths around its smooth perimeter. 

Regardless, whenever he uses the drug— that’s if he chooses to— he should wait until Katsuki’s awake, as it apparently targets their shared bond, so if any complications were to surface, it’ll ideally be when they’re both conscious and able to deal with it. 

After a few minutes spent ruminating the idea and possibilities of the drug, Izuku’s brain finally began to listen to his eyelids 

—

Izuku and Katsuki finally both had a day off together. It was tranquil in their home, it always was after an emotion filled night, as if a baggage was released from their shoulders. Watching in the morning, instead of the night, was against tradition, but both men couldn’t help it, watching a documentary of All Might’s personality and hero career being meticulously analysed by some random online. They watched in silence, which was also new for them; however, the disgusted expressions of disbelief, which showed themselves every time an objectively incorrect point on All Might was made, was shared between them. 

Katsuki’s bowl of food went untouched, the blonde was far too enthralled yet vexed by the documentary. Izuku on the other hand had scoffed his food up, sighing with warm contention. Ah Kacchans food was always so good..Izuku had hit gold! He found himself eyeing Katsuki’s own meal, the blonde had grown accustomed to the gourmet level dishes. But Izuku, oh he could never get enough.

“Izuku, you want another serving?” 

Katsuki stood before he could respond, grabbing the empty bowl and taking it to the kitchen. Izuku paused the documentary, he missed this, he missed it so much. Izuku was so stuck on the thought of disappointing those who gave it all for him, he didn’t realise he was hurting the one who gave the most. 

“You think too much.” The bowl was placed onto the table and despite Izuku just having a serving, he began to salivate. 

Katsuki laughed out, looking at Izuku in a way which made his heart do rigorous gymnastics, “You’re too easy to please Izuku.” Izuku flushed, he blushed so easily, Katsuki thought it was cute so he liked it about himself. 

“You’re blushing really? I hardly did anything, you’ll always be like that Izuku.” Katsuki shuffled closer slightly, and even after all these years with Izuku and Katsuki fighting together, to them realising they’re a bit— more than friends, to them buying a house together, Izuku couldn’t handle flirting, especially not from Katsuki. 

“Kacchan..you— you shouldn’t..-I mean we’re eating and—uh..” 

Katsuki was howling with laughter, “Izuku I'm just joking, but I have a whole-day patrol, apparently a group of villains trying to assassinate Endeavor.” 

Izuku’s eyes looked like full circles as he dropped his chopsticks into his bowl, staring at Katsuki in utter shock. They both stared at each other until Izuku began to smile, then Katsuki’s did until they were both laughing at the ludicrous idea of Katsuki playing body-guard to Endeavor. 

Both boys were holding their stomachs laughing, their abs aching from the dramatic giggles. Izuku’s head felt light, it hurt in a way that made him want to stop laughing; he couldn’t though, the situation was just too funny. 

“You’re being that scumbag’s body guard?!” Izuku taunted, snickering as he poked at Katsuki’s side torso around his ribs. 

The blonde let out an embarrassing yelp at the sensation, “Unfortunately, but this a serious case! These villains have been injuring a lot of heroes, I wanted you to kill them with me.” Izuku’s mouth slowly closed, the humorous atmosphere replaced with a serious one. Izuku wished he could help but with his heat coming up and the pre-heat symptoms, he’d be nothing but a burden to Kacchan. 

His mind flickered to that damned drug again, the pill, its apparently revolutionary effects. 

It could help him. 

But it was risky. What if it ended up hurting Katsuki? What if it had unknown side effects? There were too many variables and Izuku didn’t want to risk it. 

“What are you thinking of?” Katsuki took both their bowls, the ceramics clanging as one bowl slid into the concavement of the other, “you’ve been zoning out quite a bit recently.” 

Izuku just scratched his head awkwardly, he didn’t want to get Katsuki’s hopes up. 

“Nothing.” 

They went to bed normally, with Izuku thinking about that same drug, the temptation kept rising. What were the risks? He knew them well. But that itch kept growing, like a rash that’ll eventually infiltrate his entire brain, he wanted Katsuki to be happy, and now the blonde was going on a mission alone; an inevitably difficult one, and Izuku, would be nothing but a burden.

Katsuki slept like a dead man, he didn’t toss nor turn, he laid unmoving under the blanket. He was a light sleeper, but slept easily. Which meant when Izuku seemed to be an insomniac due to anxious thoughts and invasive feelings he could pass time gazing at Katsuki. Nobody was there to judge his love-heart eyes and cupid-stabbed heart. Regardless, Izuku’s his husband so he’ll admire Katsuki’s beauty as much as he wants, and when the blonde wakes up from something as mundane as the temperature changing, and notices Izuku’s staring, he’ll already be half asleep, too tired to mention it. 

Staring at Katsuki made Izuku lethargic, especially during silent nights like this one. He could appreciate every curvature which blessed his face, staring at them, wishing to run his fingers over them, it made him feel safe. 

The morning light began to illuminate the room, creating looming shadows which watched over the sleeping pair. Katsuki stirred, it was around 7am now, thankfully, he didn’t have morning patrol, he could sleep in a bit more than usual. relish in the warm snugness of his blanket. Katsuki being literally hotter than the average person was a shock to nobody; despite this, for some unbeknownst reason he couldn’t sleep without one. 

His before-work morning routine stayed the same. He got out of bed, brushed his teeth, showered, ate a balanced meal(maybe skewered in the protein section). He went to see Izuku again. Katsuki was worried, for himself, this wasn’t a normal hero killer like stain. He was inconspicuous, he moved skulky and fast. Each of his movements were calculated and thought-out. The complete opposite of Katsuki. If he loses focus it could cost his life, he had to be on edge, always waiting expectingly. 

He kissed Izuku’s forehead before he left, leaving a note to Izuku of where to find his breakfast, with a little wobbly heart ending the delineation. 

—

Izuku was flushed, he felt Katsuki’s lips against his forehead, and the need to fall out of his slumber and kiss him goodbye was overwhelming. But he couldn’t, what good would that do?

“Izuku you’re awake.” 

Oops, caught. Izuku flushed, the fever-like symptom reaching down his neck. Ah, this was embarrassing!! 

He opened his eyes trying to attempt to trick Katsuki into thinking he had just awoken. Yawning as he stretched his arms up to the ceiling, his mouth opening wide. “Izuku stop faking, I know you’ve woken up some time ago.” Katsuki simply said, and Izuku looked up at him from the bed and the blonde’s lips were pulled into a smirk. Before he could fully react Katsuki leaned closer, pressing his lips against Izuku’s own, no lust was in it, though it was rather passionate. Izuku wrapped his arms around Katsuki’s shoulders, pulling his head in closer. Everything was sublime, Katsuki felt like safety and love. Neither of them used tongue, scared that if they were to, the kiss would escalate into sex and although that’s exactly what Izuku wanted, Katsuki had to go now. The omega pulled away reluctantly, he felt insatiable, ravenous, he wanted to eat Katsuki whole and Ride him until he’s drained and whimpering Izuku’s name. 

Katsuki felt the same, although he hid it far— far better than Izuku. 

“Fuck, I should get going.” Katsuki said, pressing another kiss to Izuku’s forehead, Izuku wanted those lips all over his body. He watched as Katsuki left their bedroom, his costume perfectly sculpting his muscles, his arms and face already glazed in a thin layer of sweat. Izuku wanted to trace every dip and crevice of Katsuki’s body with his tongue. Fuck, he was perfect. 

Stuck in his sexual thoughts he forgot to say goodbye and wish Katsuki luck, he quickly sprang up, ignoring the growing problem in the south as he opened the window. 

“Kacchan,” He stuck his head through, waving enthusiastically, “Good luck!” He shouted, hoping it’ll get through to the blonde. Katsuki turned back to the window, doing that smirk again before he exploded into the air, flying up to their opened window. He gave Izuku one last kiss before he blasted himself away, his figure getting smaller and smaller until he was fully out of Izuku’s peripheral. 

He crawled back into bed, Izuku’s cock now creating a visible bulge in his trousers from when he was thinking about Katsuki. The blond was just so hot, so confident and proud in himself, he was no different during sex, however love, carefulness and admiration were added. He was only getting more aroused, his cock was damp with precum, and he was close enough to his heat that little amounts of slick began to form. His shorts were useless so Izuku freed himself, pulling them down in one swoop. He wanted Katsuki so badly, his cock twitching as he remembered how Katsuki’s ass looked when he walked out the door. 

He put his hand under his shirt, trailing it lower, following the path of green hair from his navel to his cock, until he was pressing against the bulge. A light pressure already had him clenching his eyes shut, imagining Katsuki was palming his erection. He pressed down on erection with more pressure, not caring about stifling the moan that left his mouth, he was home alone after all. 

He kept this pattern, shamelessly groaning and whining, teasing himself until his hips were shaking, bucking up and down into the air. If only Katsuki was here, Izuku could be fucking up into him instead. Once he was satisfied and thoroughly pent-up, his arm reached his waistband, teasing the elastic band. He was so hard now, the thought of Katsuki being here, what they’d have been doing if he didn’t have patrol; it was too much. Izuku finally slowly pulled his briefs down, his cock sprang up as soon as it was free, hitting his stomach and dribbling lines of precum down the shaft. 

He groaned at his own arousal, his cock head was raw and sensitive. He collected some of his precum on his thumb, holding his shaft and rubbing circles around his head. Izuku squeezed his eyes shut, letting himself moan loudly into the empty room, succumbing to the pleasure. Too lazy to get the lube, he spat on his hand, wrapping it around his cock to slick it up. Kacchan usually didn’t use lube nor spit, due to his sweaty hands he could jerk off without any, Izuku imagined those hands wrapped on his dick. He teased the head like Katsuki would, his palm gliding down the length as Izuku began to jerk himself off in long tugs. 

His mouth opened, pants and pleas directed to nobody spilling out, his cock twitched in his grasp and Izuku continued, he squeezed his cock tighter, it wasn’t as tight as Katsuki, Izuku increased the pressure around his length, his hands moving in long strokes. 

The precum had spread down his length, dripping onto his balls and creating a mess, it only made the noises more wet and sloppy as he went faster. 

He was moaning loudly now, instinctively spreading his legs wider, his hand bobbing over the length over and over again in tight strokes. In a haze of pleasure, he let his head loll back onto the pillow, using his other hand to lightly cup his balls. Izuku was left shaking and bucking his hips as he began to massage them while stroking his cock. It was too much at once, too good. His mouth was stuck open as he moaned shamelessly, that familiar coil beginning to build up in his groin. 

Izuku babbled for Katsuki, anything from his hero name to his nickname, he wanted to feel that tight ring of muscle clenching around his cock, pulsing as it clenched down, milking Izuku’s orgasm right out of him. Katsuki would be a sight, unaware of his own neediness, he’d be spewing incoherent praise to Izuku, his face red and lewd. Those eyes— red and passionate, turned dazed and glossed in pleasure— Izuku jerked himself faster, his hips twitched more and his legs shook as he arched up against the mattress. The stimulation reached its zenith, the build up of pleasure crashing down onto Izuku. 

He loudly moaned Katsuki’s name, his legs closing together as his cock began to spurt thick lines of cum onto his abdomen. His balls throbbed as the shots ended, instead his cum was oozing steadily out the slit of his cock, making a mess on his thighs. In the haze of pleasure, Izuku scooped a finger-full of cum off his stomach, swirling the digit in his mouth. He cringed at the taste, but did it again before he went up to clean.

—

Post-nut clarity hit fast and Izuku suddenly felt ashamed that he was only thinking of Katsuki lustfully, in a time where he should be worrying about him. Katsuki could be fighting already, and the blonde seemed serious before he left. Now just thinking about the heinous villains Katsuki will be fighting, it made Izuku dizzy with concern. 

Izuku wanted to be there. He wanted Katsuki to be able to depend on him, he wanted to see the blonde sarcastic, feign of annoyance whenever Izuku beat him to a punch. 

His mind flickered back to Hatsume’s gadget; the drug was unopened, hardly even looked at, just neglected in its packaging. Izuku flipped himself so his head was upside-down. He knew where the box was. He looked at it for a while, deciding to not risk it, as it’s only a prototype, before going back to it. The temptation was at its peak, the need to please Katsuki was also. He took the container out, opening it to reveal the small package. Izuku held his breath as he finally took it a step further, taking out the box. After restless nights reading the same ‘warning, regulations and instructions’ script over and over again, Izuku already had enough knowledge on how the drug was supposed to work. 

He wanted to wait until he could inquire into the  details of the drug, gauge a better understanding of its nature; however, simultaneously, he wanted to make Katsuki proud. His want for the latter largely out-scaled his precautions. It was a singular drug, which made sense as it was only a rough prototype. Its appearance didn’t heavily differ from the kind of drugs you’d get in a medicinal environment, it was enclosed in a fully red capsule. Izuku could slightly hear its contents when he shook it, for some weird reason the sound made his initial apprehension grow tenfold. 

He couldn’t go back now, not when his mind was already conjuring situations of him and Katsuki fighting alongside each other, the adrenaline of risking your life next to the one you loved. It was inimitable. 

He grabbed the bottle of water he kept on his bedside table, putting the capsule into his mouth and flushing it down with a gulp. There. Done.

Izuku knew medication always needed a few hours until the effects took place. Since this wasn’t ‘normal’ medication, but a mechanically altered one, it was possible that the onset of the drug's effect would be skewered. Izuku microwaved the left-overs from yesterday’s dinner, its rich flavour only diminished a little bit, still, he swallowed it down as fast. 

The next hour was like the night before a vacation, Izuku waited on the edge of his seat as the clock seemed to stay stationary. He already washed the dishes he used, his stomach growled for another bowl but he knew Katsuki would be hungry after he’s back, so he decided to leave the bowl in the fridge. He means…he could always cook for Kacchan himself, it wouldn’t be as good but maybe the idea of Izuku’s ‘love’ being in it would bump the gastronomic score. Or perhaps Izuku was just looking for any reason to finish the food. Also very possible. He decided he had time to kill so cooking for Katsuki it’ll be! 

The food looked…edible— somehow more so than it tasted. Izuku wasn’t sure where it went wrong, he didn’t use a recipe but honestly, Katsuki never had either, the blonde always seemed to just eyeball the quantities, and his cooking could be served in five-star restaurants. However, the concoction Izuku had in front of him looked like it couldn’t even be sold in a super-market. It looked as if it had an unnameable disease or something similar, Izuku poked at the meal. Basic onigiri, but the rice wasn’t soft and fluffy like Katsuki’s, it was hard and almost— crunchy. Izuku will try again. 

Second attempt. Izuku waltzed around the kitchen, he felt like a chef. Katsuki always had his headphones on when he cooked and Izuku began to understand why, the thought sounded therapeutic and tranquillising. The second batch seemed to be a huge improvement. Izuku put the seaweed around the bottom half and it seemed good, the rice seemed to melt downward around the seaweed, and it looked like the colossal rice moulded shapes were about to engulf the green. He quickly put it in the fridge before that happened, Out of sight, out of mind . 

That was fun and the clock seemed to agree as over an hour passed in what felt like 15 minutes. Izuku was so focused he almost forgot about the drug. But now as he paid attention to his body again, the change was patent as the blue sky. His movement, his emotions, his blood; it all felt dislocated for a second, as if his body was being pulled apart or reshaped from the inside. Izuku’s body dropped to the ground, his legs seemed to suddenly give out, a sore aching in his bone, turned them into lead. His arms gave out, then his spine, feet, shoulders, fingers until he was paralysed on the ground. Then came the ache, a dissociated ringing in Izuku’s bones had him shouting in abject horror. 

The shouting traveled away from him, it too was dislocated, sounding as if it initially came from some far away place, like someone was shouting at Izuku. His head rang with the terror of his own screamed, his mouth seeming to be the only working part of him. We’re his organs shutting down? Was he dying? He laid unmoving on the floor, occasionally his body would involuntarily twitch, the helplessness engulfed Izuku leaving him with a deep sense of regret. He closed his eyes, begging Kacchan to come home early. 

—

It appeared to be afternoon still, Izuku could hardly see through the kitchen window but managed. 

He felt light, his bones were light as paper and his brain was screaming reassurances into his mind. He lifted his head up, far too easily for the state he was in prior. He sat up easily, his bones, once aching and paralysed, seemed to revert back into their initial state, if not they were even better. Izuku easily stood up, dusting himself down. He felt dependable and strong. For the last few days his instincts had been screaming in his ears, anxiety about nesting nagging at him, it all mellowed out now. Izuku felt calm, as he said— light. 

He stood up, he seemed to physically look the same, he half expected himself to have undergone some change in his physicality, like an increase in his height or more prominent muscles; however neither of these things manifested. 

His footsteps patted up the stairs loudly, a spring of excitement and unbeknownst enthusiasm in his step. 

He wanted to see the blonde expressive face when shock and indomitable warmth flicker across it. He kicked his shorts off, throwing his shirt over his head. He was full of energy, the thought of fighting with Katsuki only tripled his drive and soon enough Izuku was stretching and shimmying into his hero costume.

He felt omniscient, this must be how newly presented alphas felt, he opened his window, jumping out into the fresh evening air. It was refreshing, the action may have been rather profligate, but it only filled Izuku with more adrenaline. He pulled his hero tracking device down, turning on his location and following Katsuki’s own. Combining the artificial One for All, with his natural strength he was able to almost fly up. Katsuki was far away, but Izuku was fast, as the air hit against his freckled skin and Izuku sighed out, it tasted like freedom, the exact thing Izuku was yearning for. He could get addicted to this. 

He was close enough, changing the trajectory of his landing, so he landed in a safe area. Izuku didn’t care about being skulky, with his quirk, being  inconspicuous was impossible. He ran in the direction of Katsuki, but he couldn't see him. He checked his phone again, checking the location before checking the device again. This was it. The location of Katsuki appeared to be directly under him, yes the blonde was nowhere to be seen. 

Izuku panicked, until he saw flames, bright and passionate, they were a bit more north, and Izuku went running. The flames increased like gasoline was being poured into them, it was obvious they were Endeavor’s and although Izuku despised the abusive scumbag, if it was a lead hinting at Katsuki’s location, then that’s where Izuku will follow. 

He ran, too panicked to fly or jump there, the worry had crawled up his legs, making them shaky, infecting his stomach and creating a sick nauseous feeling. What was this feeling? He was angry, but it felt like every cell which coalesced to form his body also shared this feeling. He wanted to rip whatever villain this was apart. Hell, he was going to, they’d have to restrain him from killing the bastard. Izuku perfunctorily mentally apologised for his violent thoughts, but he couldn’t care less now that the flames were right in front of him. 

Endeavor was holding Katsuki, shielding him from the villains. Izuku let out a possessive growl and immediately slapped his hands over his mouth. What’s wrong with him.. He needed to focus on the issue, Endeavor held zero threat to their marriage so why was Izuku so ticked off? His quirks went haywire, and he almost fully lost control of them. Suddenly, Endeavor was behind him, a firm palm pressed down into Izuku’s shoulder. 

“Deku, you’re unneeded here”, Katsuki was flung and slumped over his shoulder like a bag of potatoes, his body lax and limply laying. It only vexed Izuku more. He was about to attack the taller man, raising his fist in a surge of misplaced anger, “Deku, take Dynamight, that’s why you’re here, is it not?” Izuku dropped his fist as Endeavor dropped Katsuki into his arms. The retired hero used the last of his strength to release a big flame, giving them all the concealment to hide or run.

Izuku went straight to the hospital, cradling Katsuki-who was too weak to protest-against his chest. Izuku’s heart-beat was fast paced and rapid, he hoped Katsuki couldn’t hear it—he probably did. 

“Kacchan?” 

Izuku would try again, the response would stay the same, well the lack of response would. Running wasn’t cutting it, this could be the effect of a fatal quirk, Katsuki could be dying in his arms right now. 

“Kacchan, it’s going to be okay, stay conscious,” Izuku leaped over sky scrapers, his jumps were uncoordinated and led by visceral emotions. He couldn’t help it. Finally he landed, the tar covered roads breaking apart under his feet as he thudded down. Izuku held Katsuki closer to him, he was shaking— they both were, just wrapped around one another, breathing in their scent. 

Suddenly the blonde shook himself awake, it started with a subtle flinch of the limb, the nerve impulse seemed to build up until he was stirring and grumbling in Izuku’s hold.

“Kacchan?!” Izuku shouted in relief. 

Katsuki wasn’t physically hurt besides a few scratches and bruises maybe. The blonde was about to speak, the words were cut off by a long yawn, it sounded like he just awoke from a month long slumber. 

“Izuku?” He whispered, his voice was so quiet, so soft; Izuku found himself leaning closer than necessary just to feel his breath against his neck, he needed proximity, even a modicum seemed to trigger all kinds of foreign senses. “Izuku idiot, drop me!” Katsuki demanded and Izuku obliged with acquiescence. 

“Kacchan, are you sure you’re okay? You’re not hurt anywhere else? What if there’s some sort of internal bleeding” 

“Stop yapping, dumbass, I feel fine” The slightly hesitation in his voice only increased Izuku’s worry, it confirmed his suspicious, even Katsuki wasn’t sure what happened, The blonde’s hands glided over his hero costume, grazing any visible skin and running over his body. It was like he was trying to find and label some sort of unnameable abnormity, but was unable to find it. Izuku understood that feeling but why would Katsuki be experiencing it?

“We’re getting you checked anyway.” Izuku burst out and before Katsuki could argue, he was dragged into the hospital.

Izuku hated the hospital, perhaps it was due to his own personal bias. He despised it, someone like Katsuki, whose perseverance and determination formed their personality, shouldn’t be in a hospital. He shoved the doors open and the eyes of the patients loomed over them. Izuku was indifferent to the attention, he knew he was acting irrationally but he needed to ensure Katsuki’s safety. 

“Get someone to check on him” Izuku demanded to the closest doctors, “please, please get someone.” 

“Izuku idiot, im fucking fine, what are you doing!?” Katsuki shouted, but Izuku was adamant, he needed the blonde to get checked. 

Why was Katsuki unable to fight? Why was Endeavor, a retired hero, helping him? Izuku couldn’t leave these questions unanswered, his brain was picking at him for an answer.

“No you’re not fine Kacchan, just— just..please, after this we can go home and cuddle on the couch.” Izuku tried to reason, and Katsuki simply huffed as a response. 

“Really Izuku, I’m telling you I’m”— Katsuki suddenly clutched his stomach, wincing in pain before his hand clutched onto Izuku’s costume—“Wait a second.” He gritted out, still clinging to the fabric. It only solidified Izuku’s choice to get Katsuki checked out. 

Two nurses appeared, scooting along a wheeled-folding hospital bed. Katsuki glared at Izuku as the man carried him onto it. Izuku couldn't care about the chagrined look, his overwhelming concern drowned every other emotion. 

Izuku followed the trolley, his hand holding Katsuki’s tightly, the blonde’s eyes twitched, his hand trembling in the warmth of Izuku’s. 

“It’ll be okay Kacchan, we’ll find out what’s wrong.” 

They entered the hospital room and Katsuki was rolling his eyes. Izuku stayed by his side of course, occasionally squeezing the blonde’s hand, a little sign of affection which went unrequited. After under a minute of strained silence, the main doctor finally entered the room, he looked at Katsuki then at Izuku before shaking his head. 

“Okay, Dynamight, what has brought you here?” The doctor adjusted his uniform, his eyes trailing down Katsuki, scrutinising his expression and body. 

The blonde groaned, clearly annoyed and not wanting to be there, “I just passed out during battle, no big deal, I’m feeling fine now.” Katsuki tried to clear up, his fingers drumming against his thigh. It was clear to Izuku that he was lying, or at least only saying a quarter of the truth. The doctor seemed to catch his lie, his eyes craning down to look at Katsuki skeptically, before he cleared his throat.

“All good.” The doctor clicked on the laptop, the keys clacked over and over again, it hurt Katsuki’s head. 

“There are various reasons why someone might faint, in your files it says you haven’t been hospitalised for fainting in the last 10 years?” The doctor checked up, and Katsuki nodded. 

“Usually, when someone faints it’s due to sudden movement, like standing up too fast, hormone imbalance and fast change in hormones or a lack of nutrients or minerals.” The doctor finished, handing Katsuki a leaflet centered around passing out, the blonde stared at the doctor with a look of insolence. “You could guess which one it probably is, in your case.” 

Izuku’s concern had diminished, but his confusion and questions didn’t cease. Hormone imbalance? It makes perfect sense especially after the drug targeted their shared bond; however, Katsuki shouldn’t be having any symptoms from Izuku’s usage, it should only affect him. Izuku’s eyes flickered to Katsuki and the blond was staring at him, late realisation overtaking their irises, his face soured more and Izuku wondered what the second realisation was. 

The doctor left, coming back with a little funnel-like cardboard box and a small clear jar. 

“Here, I'm assuming you’re aware of what to do?” The doctor asked and Katsuki nodded, throwing his head back in annoyance as he hopped off the bed, grabbing the medical equipment and leaving for the bathroom.

Izuku’s feet patted rhymically on the ground, he was restless, he’d sit down, his foot would bounce against the ground, and he felt like the doctor could hear his bones and breathing so he’d stand again. What was this feeling? Like electricity, every second was an hour and he wasn’t sure how to pass the time.  

“Will he be okay?” 

“You saw him, he’s fine, it’s nothing serious.” 

“I see.”

Attempting to speak to the doctor was similar to speaking to a wall, it was unprogressive and Izuku felt like he was only disrupting the man’s work. 

After a few seconds of Izuku holding his breath, the silence was cut, “You’re an omega?” The doctor asked, turning away from his work to give Izuku his ear. 

“Yes— doctor, well it’s one of Hatsume’s gadgets you see, biologically yes..but right now, I guess— I guess I'm not sure.” He tried to explain efficiently, feeling his face heat up slightly each struggling word. 

The doctor sighed lethargically, and Izuku had to refrain himself from groaning. He hated their tiredness and unenthusiasm. 

“How interesting, you smell nothing like one, Dynamight is most likely an omega, or at least shares the hormones of one.”

“What?” It was ludicrous, almost laughable the idea, Izuku stared in utter shock. He waited for the punchline, but it never came.

“If this drug targeted your shared bond, then it’s impossible for it to only have an effect on one of you. It’s a bond.” He stated perfunctorily, Izuku hated the condescending tone, and regardless, he had already rejected that idea. He was immediately proven wrong when he inhaled and a scent, foreign to him, filled his nostrils. His breathing slowed down, his inhales turning into long dragged sniffs. He smelt completely different, before his smell was a sweet, powdery, enigmatic scent, but now it was sharp. Izuku still couldn’t really put a finger on it. It was fresh like new books and leather, it slightly scared him, that that smell was being emitted from him.

In a few seconds Katsuki left the toilet, handing the sample to the doctor and sitting down beside Izuku with a groan. Izuku noticed Katsuki also had a smell, though it was quite muted and overcome by his normal sweet scent, Izuku had to restrain himself from shoving his nose into the crook of Katsuki’s neck. 

A couple of nurses came to collect the sample and bring it into testing, all while Izuku was increasingly turning red while trying to avoid Katsuki’s lingering eyes. Kacchan is an omega. The thought— it was surreal, but the proof was in front of him now, the doctor confirmed it, and it was about to be objective when the analysis came back.

To Izuku, the clock was currently the most interesting thing, time has gone back to ticking one second an hour and Izuku’s being reminded of why he hated hospitals in the first place. With Katsuki leaving to make essential phone calls to his PR and agency, Izuku was left tapping his foot to the ground. 

Katsuki as an omega. 

He hasn’t really thought of it much. The concept of someone like Kacchan being an omega , it was ironic, a weird joke where any second now streamers would explode from the sky, a crowd of 1000 was about to pop out, and laugh at his ‘picture-worthy’ expression, then Katsuki would come out laughing at his idiocy and they can go home and watch television. No, that didn’t happen, of course it didn’t, because Katsuki was already on the phone, presumably updating his agency with their predicament and telling them that he and Izuku were going to be off for a week. 

How did Katsuki feel about this? He must feel betrayed. Izuku could remember how his bones fossilised leaving his numb yet somewhat conscious. He couldn’t imagine that during battle. What was Izuku thinking… Then when Izuku finally arrived at the scene, he was basically labelled useless. He made Katsuki fail his mission for what? Did Izuku seriously think he was helping? 

The doctor left the room, of course his sudden departing went unexplained. Izuku snatched some minutes of solidarity. Before he came back with Katsuki and a sheet of paper. Katsuki was sitting where he initially sat before, long given up on making Izuku meet his eye, he focused on the doctor's words. The doctor seemed almost pleased, Izuku blinked many times, flickering between a few hard blinks and many lighter ones. The trace of impressiveness and curiosity was undoubted in his expression. 

“I’ve never seen this before, it’s truly art.” The doctor began his speech, holding the paper up in a manner which kept its contents indecipherable to the other two in the room, “Dynamight, I’m  assuming you already are aware of the results?” Passing the blonde the paper anyway. 

Katsuki’s eyes scanned down the page. Izuku wished he could see but he had a decent rough idea of it already. Katsuki grunted in acknowledgement, crumping the paper and stuffing it into his pocket. “Anything else I should know?” 

“Your cycle should carry on from where Izuku’s cut off, your hormones show you're close to heat. The rest is just normal support which your— alpha, could help you with.” 

Izuku’s eyes widened as he was referred to as Katsuki’s alpha. It felt weird— the term. Izuku, being an alpha? It was like the sky being green, and the grass being blue. He nodded quickly and Katsuki sighed heavily at his enthusiasm. 

“So we can go now?” 

“Yes, there’s a leaflet on newly transitioned omegas, you can get it on your way out.” 

Izuku could’ve sworn a vein popped out of Katsuki's head, the blonde grit his teeth together, going against every thought in his mind, which all screamed at him to explode that guy.

Chapter Text

What made someone a good person? Who was superior enough to dictate what made one person better than another: Heroes, the government, the police force— all these people were just people. Katsuki didn’t care. Anyone who says Izuku isn’t an angel from heaven, was a blind dumbass.

Once Katsuki had mellowed down he could smell Izuku everywhere. The scent wasn’t light anymore, it was leathery and had some sort of unnameable fresh scent integrated in it. 

The sky was dark once they left the hospital, with neither of them bringing cars— Katsuki used his explosions to fly there, and Izuku used One for All— they had to fly back home, Katsuki was worried for Izuku, he tried to conceal it but the troubled glances didn’t cease to exist. He could tell Izuku was also troubled, the expression on his face was inscrutable but surely woeful, as if he was deep in thought. Katsuki wanted to scream at him, tell him he’s annoying and that he should’ve waited until they were both home to try something like that. But he could find no hatred in his mind nor heart. 

Once they went home Izuku went upstairs, deciding to finish some work off, Katsuki was going to follow, he really wanted to, but ignored that clingy part of his head, seeing Izuku leaving as a sign of him wanting to be alone.

Katsuki hated how clingy he felt, he paced around the living room ignoring the need to bury his nose into the cushions Izuku and him cuddled on. The same with the chairs, which was horrifying to Katsuki. He was dehydrated and Izuku, his scent, body, just him, was like water to him. Katsuki’s omega wanted to sink and drown in it. 

He stopped pacing the living room after a few minutes of realisation and mentally shunning himself for his idiocy.  Katsuki really didn’t want Izuku to be upset, but simultaneously he couldn’t just tell him that, his pride was stopping him, it was breaking and soon Izuku was going to crumble that monolith, uncovering the unorthodox vulnerability that ensembled into Katsuki. Katsuki knew he’d love it. Izuku would probably give him exactly what he wanted. He would whisper soft reassurances into Katsuki’s ears, praising him for trivial things, and how Katsuki will swoon! Nothing sounds better— not even close. 

As Katsuki said: Izuku was an angel, currently an upset, confused angel going dark with self-loathing. Katsuki couldn’t let that happen, it was his job..his role to help him. 

He instantly cringed at his own words, banishing them somewhere unlocatable. What he meant is, Izuku deserves those reassurances, he deserved the little soft praises and comfort. Especially someone like him, who overthought, and overthought and overthought. 

Izuku’s been overthinking since he was born. He’d overthink mundane things like birthday gifts and his outfits. As he got older more things were added to his agenda: quirks, secondary gender and now his body and, well— this. For once Katsuki wanted Izuku to be able to calm down and truly relax, he was relaxed when he fought, Katsuki could see the tranquility take over his face after a particularly difficult battle, he loved that fatigued yet satisfied look. 

When Izuku stopped fighting due to his heat, those 4 days, the few pre-heat symptoms leading him to skip more days, and the single day of aftercare, led him to skip a lot of work days. Izuku’s heats are always intense, painful and unsatisfying until the end. He’s beyond insatiable and Katsuki usually ends up passing out trying to keep up, it got better once they had bonded but still, those four days seemed to be hell. Regardless, due to the missed days Izuku’s body has changed. He‘s gained more weight all over his body: his thighs are larger and his stomach bigger too. Katsuki’s love for Izuku is the exact same, if anything it has increased, after all, it wasn’t Izuku’s body that he fell in love with. The alpha still had a great figure, Izuku was the embodiment of warmth, Katsuki could stare at him all day. The best artists couldn’t capture his beauty, and Katsuki wished Izuku could see himself from his eyes, because if he saw how he looked, he’d never feel insecure again. 

—And now Izuku was hung up on this issue. This newly surfacing ‘switching secondary gender’ thing. Katsuki doesn’t think alphas have superiority over omegas. Yes, being an omega is objectively harder; however that’s solely due to society deeming them as inferior and subsequently, tailoring everything in the world to accommodate alphas. Omegas were far better at some things, just as many things as alphas, if not even more things, especially with how profligate and proprietorial alphas could be.

Honestly, yeah, Katsuki would’ve rathered if Izuku had warned him before, or if they took it together; however, initially he brought it with the understanding that if something were to happen—or if there were any inexplicable side effects— he would be okay with it. He can’t now complain or be upset that he has to experience a fraction of what Izuku’s daily life is. 

If Katsuki had to be an omega, he’d be the best one imaginable. But it was difficult to be supportive with these pre-heat symptoms, when half of him wanted Izuku to put all his attention onto hero work, the other half wanting to be fucked into the mattress every hour of the day. It was difficult to find a compromise with his insatiability, especially when he didn’t know how to control it. How does Izuku act perfectly appropriate around this time of his heat cycle? The answer was unbeknownst to Katsuki. 

All he could think of was what Izuku would be doing right now if he hadn’t taken that mechanical drug? Would he be fingering himself in their bedroom, moaning Katsuki’s name and biting down into his pillow as he orgasmed? Katsuki tried to shake the filthy thoughts away but they persisted. Perhaps Katsuki would be fucking into him right now, fingers grabbing his hips —Katsuki stop.

He shamed his mind’s shallowness, Izuku was hurt right now and Katsuki needed to help. The blonde headed upstairs, each step ascended more conflicted than the last as his legs battled his pride. He finally reached the top, stretching out.

Izuku always worked alone with the door fully opened, the last part was especially crucial, now due to his paranoia from past events. Izuku looked down the hallway, probably immediately catching the hesitant footsteps. He smiled bleakly at Katsuki, a half-genuine smile, before he went back to his work. Katsuki knew all of Izuku. He’s read all of Izuku and knew exactly what made him happy— and how he’d show this happiness, likewise, he knew exactly how he acted when upset. 

Usually Izuku would cheer, stand up or do a dramatic, over exaggerated wave at Katsuki. He did none of those things, his eyes downcasted after he perfunctorily smiled. He looked at his computer in a blank haze. He wasn’t currently doing work— that was obvious. The alpha was just staring through his computer, eyes not scanning nor reading any of the writing on his screen. He was just trying to avoid Katsuki. 

The blonde was about to question him. Respond to Izuku’s insipidness with his own anger, eventually forcing an answer out of him. 

Izuku’s hands trembled against the keys. He kept feigning professionalism, the fingers pressing down, clicking down on the keyboard as he typed something which surely wasn’t relevant right now, just a pass time, a bluff that Izuku knew Katsuki could never fall for. He typed faster, more desperately. 

He wasn’t even trying to be inconspicuous, he seemed to just want Katsuki’s cautious suspicion gone. 

“Izuku.” Katsuki said, and the alpha corrected his bad posture, letting out a jagged sigh. 

“Yes kacchan?” He put on a grin, although it was forged. It didn’t reach his eyes properly and he knew that Katsuki knew. 

The blonde shook his head in disappointment, heading closer to Izuku, “Kacchan?” He repeated, “You should be resting, you know, your heat will be in some days, want my help with something?” Izuku rambled, and the blonde hushed him, putting his palm over the other man’s, which now laid lax and unmoving on the computer mouse. Izuku’s mouth closed, he understood what Katsuki felt, but he couldn’t understand why. 

Why didn’t Katsuki shout and rage and blow up shit. Izuku could've gotten him killed. Hell, he almost made him fail his mission. Katsuki should be angry, he deserved to feel that. But then why was he looking at him like that? 

Izuku didn’t turn to look at him, he wanted Katsuki to see his sham and believe it regardless of how obvious it was. He thought Katsuki would give him space, some air to clear his head; but he didn’t. Izuku felt a lump forming in his throat, growing as he thought more about their current issue and how he temporarily ruined Katsuki’s hero life. He couldn’t help but think Katsuki deserved better, perhaps the blonde wasn’t as lucky as Izuku initially thought. 

The lump grew, it squeezed his vocal cords aside, straining them in a way which made talking impossible. Why was Katsuki still there? 

Izuku kept his face on his screen. He didn’t want Katsuki to see his face. The blonde would know immediately. 

He felt Katsuki’s feet moving, he wouldn’t dare peek, instead looking forward, at the ‘work’ that’s been sitting on his screen since he came back. 

Izuku couldn’t focus, he could look at the screen, controlling his eyes to look at the words, he could scan his eyes over vaguely familiar words again and again, it wouldn’t change how they failed to penetrate his mind. Izuku couldn’t get Katsuki out of his head. The whole half-hour, since they entered the house, Izuku’s been encompassed in guilt. He’s tried to shake it off, reminding himself that this is what Katsuki wanted for him. But the guilt crept up his spine, to his neck, then up to his brain, leaving nothing but a sickening guilt in Izuku. 

Izuku didn’t expect Katsuki to lean forward and wrap his arms around Izuku’s chest, cradling him in his warmth. Izuku’s eyes widened slightly, fingers stuttering before eventually going still on the keyboard. He could feel Katsuki’s chest pressed against his back, the warm breath hovering over his skin. The contact made Izuku’s own breath catch in his mouth and he was unsure of what Katsuki’s intentions were. 

He couldn’t even ask. His vocal cords were currently frail from holding in sobs. If he were to inquire his voice would tremble, revealing himself even more to Katsuki. Izuku remembered when he was younger and got called a ‘cry-baby’ all the time. Now, although the phrase didn’t affect him any more than a small flick to the heart, he didn’t want Katsuki to see him cry, especially when it was due to his own actions. 

His throat was sore from restraint, he wanted to turn around and bury his face into Katsuki’s chest, just letting himself be held; but he knew that if he even saw Katsuki, the water that glazed his eyes would come pouring out. 

The thought of Katsuki being unable to work now, probably being unable to leave the house— as he is every heat— and Izuku, he put Katsuki into that situation willingly. 

“Izuku, you’ve been avoiding me, what’s wrong?” Katsuki asked, and Izuku wanted to crane his head back, relax it into the dip of Katsuki’s neck.

His over-running thoughts were put to a halt, he swallowed hard, then swallowed harder. His hands moved, laying crumpled up on his lap. 

The tears dampened his fingers, his lashes soaked as he blinked them away. The poignant streaks ran down his face in masses, coalescing around his chin before dripping down onto his fists and dampening his clothes. Blinking didn’t help, it never did, and as usual there were no onions here either for Izuku to blame his tears on. 

Izuku doesn’t deserve to cry, nothing negative has happened that could possibly result in these tears, but now they’re coming and they won’t stop until Izuku gouges his heart out, letting the feelings spill out shamelessly. 

“I— I.. honestly I'm okay, you?” He stuttered, hoping the shudder in his voice went unquestioned. It did.

“Never been better, I'm glad.” He said, and Izuku could hear that smirk on his face. He wanted to see it but his blotchy, teary face would shame such a sight.

What did Katsuki have to be happy about?

Izuku was sure it was nothing, still that smirk persisted. 

“What could you possibly be— happy about?” Izuku asked incredulously, the tears had halted fast, leaving him loudly sniffing and wiping at his red eyes. The actions were redundant, only show-casing Izuku as an emotional wreck. 

“Well you could fight normally now, no heat,” He moved one hand now, separating a few of Izuku’s curls. “and it’s only temporary, give it a few days and everything will be normal.”

The green-haired man only shook his head in disbelief, “Kacchan, you’re an omega now, you’ll have the heat. Don’t you understand that?” He fired, grabbing Katsuki’s hands out his hair and playing with the digits. 

He twisted Katsuki’s fingers repetitively, curling them so his knuckles formed right angles as he continued the nervous mannerism. 

Katsuki sighed, he latched off of Izuku. Walking to the bed, he sat down, swinging his legs over before letting out a heavy exasperated sigh, “Izuku come here.” 

“Kacchan you know I’m”— He tried to refer to the laptop, nodding his head in its direction. Katsuki’s hand stayed on the bed, patting the spot beside him, ushering Izuku to come and he followed— “Okay i’m here.”

His gaze stayed down, it was embarrassing enough having Katsuki hear him cry, the blonde had an expression of indifference on his face but his furrowed brows screamed concern. Izuku sat adjacent to him, refusing to look at Katsuki, that would be too shameful and Izuku was trying to spare some dignity.

The air was stale, it was filled with the tension of undercommunicated words and actions. Katsuki had disappointment written on his face and it made Izuku’s guilt tenfold. 

“Izuku just to be clear, I'm completely happy with this, I wouldn’t change it for anything.” Katsuki said, rolling onto his stomach so he was faced away from Izuku, his elbows buried into the pillows. Izuku couldn’t understand how he could be. Yesterday Katsuki was an alpha: the best and most respectable and the secondary genders. Now, suddenly, against his will, he’s forced to be an omega. How could he possibly be okay with that? 

“Kacchan you don’t have to act—”

“Izuku you aren’t listening, it’s fine with me.”

“How could you possibly be fine with that?!” He raised his voice, the sound breaking as it escaped his mouth as a shout. It wasn’t meant to be so loud, he was meant to hide his patheticness under a facade of equanimity, that plan has only gone downhill though. Now Izuku was back to being red and blotchy faced Izuku. 

“You failed your mission Kacchan, and you wont be able to do hero work for a week now!” He shouts, the tears pooling at his eyes again, continuous and eager. Katsuki just kicked his feet, swinging them up and down, up then down. He was acting casual. If there were any traces of fright and nerves in his head, he concealed them well. 

“Do you really think I care about hero work more than you?” 

The question was clearly rhetorical, the answer was clearer. Of course he didn’t. Insecurities whispered otherwise, they contradicted this seemingly easy question, conflicting Izuku. 

Katsuki’s expression was turning more aghast every tense second and Izuku’s eyes just kept building up with tears, how shameful. 

“Of course I know you don’t.” He conceded, his eyes downcast: doubtful. He did know, he was certain, but then why was his voice uncertain? His mind kept sending conflicting messages, and they muddled up his thoughts. He began to ponder how much Katsuki loved him. 

Why did Katsuki love him?

“Izuku—”

He was cut off by a sniff, then another one and Izuku’s heart felt like it had risen up his chest and took a vacancy in his throat. It was loud, like a drum, its rhythm only increasing, until it was a rapid, audible beat. He hadn’t even noticed it, his eyes were glazed with tears and he prayed they would stay in his eyes. His vision was blurry with the tears so he hadn’t been able to make out Katsuki’s movements. The blonde was reduced to a blurred collage. 

His eyesight was as redundant as his prayer, the dam burst as Izuku’s tears breached his eyes, curving over his features as they dribbled down his face. Nestled between sniffles and shudders Izuku babbled, variants of ‘i’m sorry’ and, ‘why do you love me’ spilling out as incoherent sobs, he felt humiliated, staring down at his legs as he cried. Suddenly the tears were accompanied by 

trembling, as if he just survived an avalanche, his body shaking despite it not being cold. 

“I’m sorry I'm not sure what’s going on..I— I just,” He could hardly speak, the words were strained and stuttered, his heart beat sped up and his lungs got desperate, they filled deeper and faster as if there wasn’t enough air in the room. Their  desperacy only increased, Izuku learned about this during hero training, he experienced it out on the battle-field when frightened civilians feared their loved ones’ lives, they’d shake and hyperventilate as he questioned them, coaxing them back down to Earth.  

Izuku felt so small and helpless. Society would laugh if they saw him: the uprising symbol of peace, having a panic attack due to his own insecurity, it was ludicrous. 

Izuku hyperventilated, the room felt small, almost like it was closing up on him, about to fully enclose around him. Katsuki blocked his vision and Izuku’s sobs got muffled by the fabric of his top-half. 

The blonde held him closer, he looped an arm around Izuku’s shoulder, leaning forward so the alpha could rest against his chest. 

“Izuku it’s okay, i’m not upset at you at all, just focus on your breathing.” Katsuki said and it sounded crazy to Izuku because currently his lungs were protesting against his rights to respire. He just kept gawking and shaking and sobbing and Katsuki just kept waiting and waiting and waiting. The blonde held Izuku’s hands, Katsuki’s breaths were exaggerated and dramatic; Izuku wasn’t sure if he was doing it on purpose or not. Regardless, he dug his head deeper into Katsuki’s chest, wanting to hide all traces of his anxiety. Surprisingly Katsuki let him, he put a hand on his head pushing it more into his chest, hiding Izuku’s humiliation from himself as he continued his exaggerated breaths and soft obvious reassurances.

Minutes past of one-sided conversation and Katsuki’s soft hands over his own. Izuku didn’t realise when his breathing began to copy Katsuki’s, it must’ve been gradual, his sobs reducing into whimpers and wet sniffs.

 It wasn’t pretty, not at all. Snot ran from his nose down his philtrum and over his lip. It was a gross sight yet Katsuki continued without judgement. He didn’t flinch or push Izuku away, he just held him close and whispered his compliments. 

Izuku’s thoughts were coherent now, his throat could probably let out some sort of decipherable word. He wiggled slightly and Katsuki’s arms fell down around him. For some reason he didn’t feel as humiliated as he expected. Izuku knew he was loved, he felt it, that sweet feeling of being understood. It coursed through him thickly. Occasionally he wouldn’t like how his body was shaped, the squish and roundness to it, similar to his cheeks and his orbicular eyes. At this moment, all those insecurities were gone, Izuku finally felt that equanimity he was searching for. 

His breaths turned even as the blockage in his throat cleared. Katsuki was no longer speaking, he yawned yet his hold on Izuku was equally warm as it had been a few minutes ago. 

“Honestly, I don’t care if I can’t fight for a while.” He looked at the alpha, and Katsuki's eyes looked passionate, as if he was on the battlefield. It roused a sense of giddiness in Izuku., “I don’t care about this secondary gender shit okay, I wanted this, and I'm happy it turned out like this.” He said, his voice was sure, devoid of any doubt. 

Izuku nodded, he pulled away, swinging his legs over the bed so he was fully sat up, his arms balancing his body as they engraved into the mattress. 

He guesses he’ll indulge in this comfort. The feeling of being held while you cried, of being encouraged to take something you always thought was undeserved: it was unmatched. 

“Thanks Kacchan.” He hummed, his legs swinging, restless with wasted adrenaline.

“You’re welcome Izuku. Just remember if I didn’t want this, I'd have made that clear already.” Katsuki said and Izuku hummed again in acknowledgement. 

After a while of being sat in comforting silence, Katsuki finally stood up, stretching his muscles and relishing in the pop and click on the joints. 

Initially, he was going to stay sat by Izuku for eternity until the alpha eventually stopped him; however, Izuku’s mutters died out, transforming into an elongated yawn, as his head flopped tiredly onto Katsuki’s shoulder. Katsuki couldn’t let Izuku sleep yet. Yes, this day was more eventful than the average week, however Katsuki had to make sure Izuku followed his basic routine.

——

The kitchen was bright; the light was gaudy and the night sky did little to dim its luminescence. Izuku was perched on the kitchen table, Katsuki scavengering through the cupboards for cooking ingredients. His eyes scanned the upper shelf as if the gastronomic items were going to magically appear there. After a few more scans, and a very meticulous one, for in case he missed something that may have been covered by a different, useless item, he finally gave in. 

go shopping tomorrow

He noted, shouting it out at Izuku as well, his addition to what would’ve been their ‘stay at home lazy day’.

He rummaged through some different cupboards —anything? Not even some leftover chicken? 

None. Nothing. He finally turned to the fridge, swinging the door open. The sight was laughable. 

It appeared to be onigiri, haphazardly laid out onto a wooden board. The rice was over cooked. It looked spongy, where one piece of rice started, each individual grain was probably indistinguishable, so over cooked it began to mould and disintegrate into one big, soft triangle. Its body engulfed the singular strip of seaweed, like when you drop a spatula into a tray of batter and it’s slowly swallowed by it. 

“Izuku.” He turned to the alpha, whose gaze was averted to the ground, staring at the wooden floor boards with feigned entrancement. 

“Izuku what is this?” Katsuki held out the board, dropping it onto the table with a flat thud, Izuku’s eyes snapped to the board, his expression didn’t turn sullen though, simply indifferent. 

“Kacchan, what do you mean? It’s clearly onigiri.” He shrugged, his eyes going up to face Katsuki directly. 

“This is hardly onigiri. It’s a disgrace to Japan!” He said and Izuku’s lips began to curve up into a smile, he laughed shamelessly, holding his hands up in defeat. 

“Fine, I just made it for you so I could eat the rest of the left-overs. It’s my second attempt. I hoped this time it would be good.” Izuku fake sulked, an elaborate, obvious yet foolproof hoax to make Katsuki guilty. It worked every single annoying time. Katsuki took an onigiri, still cold, shoving it into his mouth. He grimaced at the taste. A soft and mushy exterior yet a crunchy half interior. A cacophony of textures in his mouth. All unsatisfactory. He ate it like it was gourmet, hopefully the cringe didn’t show on his face as he took another bite, then another, and another until he looked pale and ill. 

“Kacchan there's no need to force yourself—”

“I’m not forcing myself, the food tastes far more decent than it looks.” 

“Really Kacchan?” 

No it didn’t. Somehow it tasted worse, Katsuki hid this opinion, instead simply nodding, the concoction was difficult to swallow, almost sticky, the seaweed was the only good thing(probably because it came pre-made). 

Izuku seemed to preen and Katsuki was glad he lied and forced the ‘meal’ down.

“Can I try some Kacchan?”

“No, ‘ts all mine.” He said, saving Izuku from disappointment and a trip to the hospital for food poisoning. Izuku huffed, groaning in annoyance as he moved his head away from Katsuki. 

“Should’ve taken it faster.” Katsuki goaded on. 

——

Katsuki’s horniness is becoming an issue. He didn’t know this was how Izuku felt whenever his heat was coming. He just wanted to lick every inch and crevice of Izuku, relishing in the salt of his sweat coating his tongue, the thought alongside a video or picture was usually enough to bring Katsuki to orgasm while he masturbated. The dark nights spent in pleasured solitude, legs shaking as he’d lazily jerk his cock off. Only after 3 orgasms, would he feel satisfied enough to rest. 

The blonde just wanted to be stretched open on his alpha’s thick cock. He wanted it so badly. Izuku’s cock had stayed mostly the same size and shape. Perfect, his cock was perfect, the shaft was slightly tan coloured, the bottom half of it at least, the top section of his cock collected a pink-ish hue. Just the thought of it made his own cock stir and harden in his boxers. The size— still far smaller than a biological alpha—didn’t affect Katsuki. It was Izuku’s after all, and Izuku alone was the only thing able to arouse him. The perfect shape, his heavy scrotum, how Katsuki wanted to worship it, he needed to taste it. 

Izuku probably knew— Katsuki wasn’t certain. Regardless, the alpha has also been acting strange. Izuku has been slightly vexed around Katsuki’s friends, he has become snappy and quippy around them, saying condescending remarks and borderline-insults directed at them to the point Katsuki’s friends kind of began to estrange him.

Where Katsuki should feel annoyed and upset at Izuku, for being unable to keep his jealousy in his head, the thought of Izuku being jealous only makes his cock twitch. 

How would Izuku act in rut? If Katsuki’s mind was a supplier, that one thought was probably a best seller. God how Izuku would be in a rut. Would he be as insatiable as when in heat? Probably not..not sexually at least, after all, omegas are known for their high libidos. That fact didn’t change how Katsuki fantasised about how Izuku would change when in the throes of his rut. How his balls would swell with cum, his cock turning pink with frustration. He’d have to unload it all into Katsuki. Fuck, the omega would let him, he’d just be a good mate— hold his legs open—

“Kacchan?” Izuku called out and Katsuki was knocked right out of his sexual day-dream. His face flushed as he turned to Izuku with fake annoyance. To his chagrin the alpha seemed completely fine, he wasn’t hurt or…in need of help or anything similar. There was no valid reason for Izuku to make Katsuki have to stop his fantasy! 

“Izuku?” He grunted 

The alpha seemed doubtful, in himself probably, conflicted on some unknown thing which Katsuki assumed led Izuku to him. He was also flushed, surely for a different reason. He couldn’t stand still, swaying nervously as he shuffled deeper into the confinement of Katsuki’s mind. 

“Well”— He paced around the room and Katsuki was beginning to get worried— “I keep lashing out at our friends…how do I control this jealousy, I lashed out at Kirishima today..he wasn’t even doing anything, he just asked if you were okay, but his tone..he was trying to threaten me, then Kaminari too but that’s because a whole different reason— talking about Kaminari have you heard about the—”

“muttering.” Katsuki simply informed Izuku but guilt dusted over his prior emotions. He hadn’t thought about how Izuku might be feeling after this change, and Izuku’s been worrying so much about how Katsuki might be feeling. With Katsuki not caring much that he’s an omega, as annoying and persistent as the pre-heat symptoms are, what Izuku’s experiencing is far worse in comparison. 

“Just leave it Izuku, I’lll message them.” Katsuki said calmly, Izuku didn’t seem that convinced, still pacing although he’s stopped muttering alongside it. “Izuku, trust me, they’ll understand, they still like you as much as they always have.” He continued and Izuku was nodding his head, he fiddled with his fingers as he always did when he was nervous and Katsuki wanted to find a way to rid him of all this anxiety.

The clouds migrated away from the sky as it darkened, or maybe they were just indistinguishable when put behind a dark template. A feeling of isolation was cast down onto Japan, and Katsuki felt separated from the rest of society. This is how it was meant to be, just him and Izuku. 

“Come on, it’s going to be okay Izuku, let’s cook dinner then call it a day.”

——

After Izuku’s first cooking disaster, he couldn’t imagine cooking again, nor could he imagine facing Katsuki. The gastronomic wasn’t his forte, Izuku had promised himself to never cook again, thus, he promised to never give Katsuki food poisoning again. 

The onigiri was, with lack of a better word, inedible. Well a couple hours after Katsuki ingested it, after the persistent stomach ache which led to the vomiting, Izuku deemed it inedible. Katsuki said he didn’t care, and that it tasted good. Izuku hadn’t tried it himself; however he knew it was a fib. 

Currently Katsuki was huddled in bed, a bucket beside him. Izuku occasionally heard more retching, angry shouts of frustration and annoyance. The omega(feels strange to call Katsuki that), claimed he didn’t need Izuku that much, he actually told him to just ‘continue his normal routine’, but of course Izuku is unable to just act normal when his mate is ill, thus, he offered to make a good meal. Nothing original nor creative, just instant ramen. Of course this didn’t hinder Izuku’s own creativity, he chopped some spring onion into small cylinders, adding chilli flakes and this random red spicy powder which Katsuki always abused. By the end it looked good, the smell was deathly, but it looked pleasant enough to pass as store-bought. 

He put the food on a tray. If it were up to him, he’d wear goggles to protect his eyes from the spicy fumes. Pernicious gas leaked out the bowl, assaulting his eyes and turning him into a snotty mess. He sniffled as he grabbed the chopsticks and a soup spoon. He decided that although it was a bit excessive, he’d grab some handkerchieves, so he could fold them into the collar of Katsuki’s shirt. 

He rounded this up, realising he forgot to make tea. Honestly, he never planned to make any but his mama always made him tea when he was ill. He held the tray with one hand, balancing it  skillfully as he plugged the kettle in. Once the water was boiling he dashed upstairs, two steps a time, the tray still balanced. It was unshaken, hardly moving as he ascended. 

Upon entering the bedroom, he hardly spared Katsuki a glance. 

“Got your food Kacchan, eat up,” 

He gave Katsuki a light forehead kiss, the skin was damp and sweat-glazed, regardless, he pressed another kiss to the same spot, then one on his forehead before Izuku was running off to check the tea.

It was hot enough, he wasn’t sure whether to make chamomile or green tea. He ended up with some strange concoction that you’d get when you were younger and tried to mix a bunch of liquids into one container. He put the mixture into one of the many All Might mugs they’ve collected over time. 

Both Katsuki and Izuku had to come to terms with the fact that once they started living together, they’d eventually have to merge their collections. Izuku had antique All Might merchandise dating from before they were even born. Katsuki always told people that he was the one who collected them and with his wealthy background and prestigious childhood-home, they always believed him. The look on their faces when Izuku actually admits it’s him who brought it, priceless. 

Izuku removed the teabags, tossing them into the trash before he hurried up to Katsuki. 

Katsuki looked disorientated and dazed, his eyes were puffy with tears that formed involuntarily whenever he threw up. His cheeks were flushed from the sickness and he appeared frail. Izuku knew not to treat him like this….well he was aware that he shouldn’t treat the blonde like this. He couldn’t help it, he just wanted to help Kacchan, his omega, his— his— 

Izuku, calm down, breathe, he doesn’t belong to you. 

He sat the tea on the bedside table, blowing on it a few times to try and ‘cool’ it down, something else his mother had always done. Although it was futile, it mentally made young ill Izuku feel better so he’ll carry on those mannerisms to Katsuki. He swirled the liquid in the mug making sure none lay stagnant at the bottom of the ceramic. 

Katsuki heaved, gagging as his body attempted to throw up his stomach. His mouth over-salivated the way it always did when one was about to throw up. Preparing his body for the bouts of stale bile which rose, burning his stomach and subsequently his eyes as he teared up.

“Kacchan!” Izuku sprang up, he was quick to aid Katsuki, rubbing circles against the skin. Izuku had never been ill during a pre-heat. He couldn’t imagine what he was making Katsuki go through. 

“I’m fine, idiot, stop worrying and go back to work.” Katsuki snapped, gulping down some more water, which would probably be vomited back up in a few minutes, “Or I guess you could come in, if you don’t have any patrol that is?” 

“Kacchan you have to eat..the food will get cold and I don’t want to distract you.” 

“I said stop worrying just listen to me and come!” 

Izuku slipped under the duvet, he wasn’t sure what to do. Katsuki was so flushed and….and vulnerable— and Izuku had to clear his mind! 

“Kacchan I’m going to go pack the left overs, i’ll be back.” Izuku pressed a soft kiss onto Katsuki’s nose, as he got out the bed he felt foolish, he only just went in after all. He felt skittish and restless, honestly he wanted to be with Katsuki— doing nothing appropriate, but still with Katsuki regardless. It wouldn’t help though, Izuku would only annoy the blond and irk him out with his weird excessive horniness.

Katsuki looked conflicted, his eyes flickered to and from Izuku, ranging from his chest to his eyes to his lips. Reluctantly, Izuku sat up walking to the door. He just needed to clear his head and deal with the growing tent in his pants. He felt guilty, leaving Katsuki in the bed. Izuku would know what it’s like when your mate leaves your side, especially during pre-heat. The desperation and irrational thoughts that are unable to be coherently voiced. 

“Izuku, come back— please just fucking—”

—And Izuku was back in bed; cooing soft praises and sweet reassurances to Katsuki. His cock only grew harder, it was like a firm bulge in his shorts and Izuku was glad he was wearing nothing tighter, he couldn’t imagine having to try to soothe the ache without being too conspicuous. 

Katsuki mattered the most right now. Bringing him comfort and happiness was at the top of Izuku’s priorities. 

He shuffled a bit, Katsuki seemed to have improved, the vomiting was far less frequent at least. The blonde wrapped his arms around Izuku’s body, burying his head into his chest and inhaling deeply. Katsuki let out a relieved sigh as if Izuku was somehow soothing his sickness indirectly. Izuku wasn’t really sure what to do, he hummed a little melody, hoping it would distract himself from his hard-on while further relaxing Katsuki. 

Katsuki mumbled something obscure into Izuku’s chest, the warm vibrations ran down Izuku’s body, before shooting up his spine, making him shiver and let out a held breath. 

He needed to leave. This wasn’t helping Katsuki and with every passing minute, Izuku’s mind got tainted by his dick’s wants. 

He wanted to cosset Katsuki, to hold the ill omega against his chest, letting Katsuki relish in each rhythmic ba-dum of Izuku’s chest. Despite this, all the man could think of was fucking Katsuki into the mattress, hearing each desperate choked out moan. Perhaps Izuku was the ill one, definitely mentally at least. His brain refused to cooperate, thinking Katsuki on his knees, tearing up as he deepthroated his cock sounded far better than any thought.

He shunned his filthy mind. 

“Kacchan?” The omega had been quiet for a while, Izuku could still feel the warm puffs against his skin however he wasn’t sure if they were breaths or snores. 

Katsuki shuffled more, trying to get comfortable before looking right up at Izuku. 

“Izuku…want you— stay.” He babbled half-asleep. Izuku condemned the first thought which entered his mind. Wrapping his arms tighter around Katsuki instead.

“I’m here Kacchan, I'm not leaving.” Izuku reassured, ignoring the ache in his briefs. 

In a few seconds Katsuki was slumped down in bed. Inhale— exhale, inhale— exhale. Katsuki had one singular freckle on his nose. While they were sprinkled all over Izuku’s face, dusted down his body too, Katsuki was more spotless. Katsuki’s brows were furrowed, even as he slept. Besides that, his face held a permanent tranquil expression. He looked pleased and far more relaxed than he did these couple of days. 

His lips always had a more pink hue on them, his cupid’s bow was defined, his lips curving downwards. Izuku had studied all the curvatures of Katsuki’s anatomy. He knew about how Katsuki only had one back dimple, he knew Katsuki had a beauty spot under his

right asscheek. It was strange, being

bonded— mated to someone. Feeling pangs of their emotions, their scent. Izuku loved Katsuki’s smell. He always had. Even the musky, sweet-smoke of nitroglycerin. It worked as a drug to Izuku, a nicotine-filled inhale which got him craving more. 

Eventually Izuku’s own eyes began to droop. He slipped out of bed, dumping the filthy puke filled bucket into the toilet, before washing the plastic. He could hear Katsuki’s light snoring from afar and he yearned to be in his warmth. 

—

In some hours the sun began to reveal its glory, sunlight entering through the curtains and laying over the earth in vehement rays. Katsuki stirred, he thought his heat would be today, he felt completely normal— if anything he felt more tranquil and light. He yawned, his mouth widening as he took in the air, taking in Izuku’s air and scent. Everything in Katsuki’s life was Izuku’s and Izuku was everything in Katsuki’s life. 

He wanted to sleep again, his eyelids flickered, Izuku was a sight. Laying sluggish on the bed, Izuku was drooling slightly, he has always done that. He closed his eyes, pushing his head further into Izuku’s body. Closing his eyes didn’t seem to trick his brain into a more fatigued state. He kept them close for a minute, slowing down his breathing. It failed to make him lethargic. 

Katsuki missed hero work. What has it been? A day? Two? He felt lazy just loitering around the house, normally he was quick to pick up any shift. 

Morning patrol? He had it. 

His birthday? Christmas? If it weren’t for Izuku Katsuki would work on all these days. He was pretty self-aware, although as a child he was the opposite, lacking normal comprehension.

He was a nuisance, far too arrogant and selfish. Katsuki didn’t know anything besides his quirk. He was only praised for his quirk, its unusually strong abilities, its flashy nature and violent tendencies. People praised the fuck out of him, and somewhere, in his shrunken, black-and-white thoughts, he believed a quirk was what made someone worthy. 

Quirks are nothing. They’re simply mundane, genetic characteristics that determine nothing when it comes to how good one is. 

He checked his past router, Katsuki would’ve had a patrol from 7:00 to 10:30. He already told his agency that he and Izuku would be unavailable for an unspecified time. Still the patrol shifts and missions lingered, a tempting taunt on his phone screen. His eyes went back to Izuku who had probably changed positions three times since Katsuki woke up. 

Katsuki did this for Izuku, he shouldn’t burden him by making the alpha stay with him in the house, that just wouldn’t be fair. 

Waking up Izuku could be a challenge on Taskmaster, he tossed and turned in different abstract positions with every light nudge. He turned onto his side, one leg straight down the other bent up in line with his hips, and although it made his ass look great, Katsuki wanted him awake and sexy, not asleep and sexy. 

Next nudge Izuku woke up for a split second, eyes opening slightly before he yawned and turned so he wasn’t facing the curtains

“Uh…….hmph…you’re..sweaty—yuck.” He muttered, pulling the blanket over his face and subsequently stealing half of it from Katsuki. 

Left in a sudden cold chill of air, Katsuki had to resort to violence, grabbing the blanket and yanking it right off of Izuku. 

Slowly but inevitably, Izuku’s hands dragged against his body as if he was looking for the stolen duvet. He grabbed at the air around him, pulling it over himself like a mime performing a trick. 

“..Where—” Izuku continued, turning again, once he found out the blanket was gone. 

Katsuki had to use his hands to muffle his laugh. 

Izuku's eyes slowly opened, squinting at the brightness. 

“Can you shut the curtains, too bright.” He said, before groaning in annoyance when Katsuki threw the balled up duvet at him. 

Finally Izuku was awake, not fully, but whatever stage of consciousness he was on was adequate enough for Katsuki. He laughed more at Izuku’s chagrined expression, it reminded him of when the alpha went through his ‘rebellious phase’ in UA. 

“I was meant to have a shift today.” Katsuki began.

“I know.” Izuku was groggy in the mornings, he could get a bit cranky and Katsuki found it humorous. “Is that why you woke me up Kacchan, to tell me about your shift?”

The blonde shook his head. 

“No idiot, I wanted you to take the shift.”

Izuku craned his head up to look at Katsuki, the alpha had an incredulous expression on his face. 

“So?” Katsuki pressed for an answer, and Izuku dryly gulped before nodding his head. The nod seemed strained like he was trying to convince himself to do this, whilst contemplating the possible negative effects of it.

“But Kacchan your heat is near, and it’s going to be bad since it’s your first one.” He tried to reason with the blonde but it didn’t work. Emphasising on how grim the first heat usually is for an omega; sometimes, unfortunately more often than preferred, due to the lack of funds put into omega research and development, many omegas go into their first heat misinformed or unprepared. It’s a traumatising thing for many omegas, Izuku included, so he wanted Katsuki to be able to rest his body before such an exorbitant use of energy. 

Despite this, Katsuki was adamant and once Katsuki was sure of something, he stayed sure. 

“Izuku I ate this stupid thing so you could fucking fight, you better go and do that.” His tone raised a few decimetres. He pointed a firm finger accusationally at Izuku, who just sighed in defeat, putting his hands up in a ‘surrender’ motion. 

Katsuki had a stern expression on his face. He needed Izuku to cooperate— to understand that although this is what Katsuki wanted. The blonde only wanted this if it meant Izuku could do hero work at his peak. He didn’t mind if he had to be a cheerleader and encourage Izuku from the sidelines. None of that mattered. He only had one goal, and that was for Izuku to be able to fight at his zenith. Until he’s unable to do that, which is when this quirk wears off and Izuku’s next heat arrives in a couple of months, Katsuki wants to see him on the podium.

Katsuki is very honest when it comes to Izuku. Yes, they’re married and Katsuki is smitten, but Katsuki’s honesty is surely more evident than his love? Izuku is perfect, he’s probably the epitome of a sublime being. Katsuki often pondered just how such a person like Izuku could be into a person like him. As he said, he’s far more self aware, so he knows that he’s attractive too. Sometimes Katsuki questioned his fangirls’ mental state, they were rabid and almost violent at times. 

In the eyes of their fans, Katsuki and Izuku weren't a couple. There had been some conspiracies around however those were simply apocryphal stories with no solidity. 

Once a picture got leaked from God-knows-where. It was Katsuki and Izuku at a private bar, getting a bit more—handsy with each other than ever. For that next week the paparazzi made it their mission to scrutinise their life and social posts to find any sort of validity. Despite their zeal, they lacked any answers and therefore, the rumour slowly died down like any other rumour.

Katsuki couldn’t help but gaze at Izuku as the alpha shuffled into his hero costume. The tight, spandex-like garment stretched over his skin beautifully. God Katsuki has never felt more jealous of clothes. 

Izuku would occasionally peek glances at Katsuki, as if he still expected the blonde to reveal that he in fact didn’t want Izuku going to work. Katsuki just occasionally nodded, an indirect source of comfort. 

“Kacchan i’ve never left you alone, really we don’t know how your omega would act this close to heat.” He made a final attempt to change Katsuki's irrational mind. It still didn’t work, the blonde was stubborn as when he was an alpha. Being an omega hardly mellowed him out. If anything— so close to heat, it only made his vexation tenfold. 

“I’ll be fine.” He finalised, “just go and kill all those villains already.” 

Izuku gulped, swallowing the boulder of anxiety down his throat before nodding. Arguing with Katsuki was futile, he should know that more than anyone. The blonde laid on the bed as if he’d just awoken. It was weird to see Katsuki in the morning, not wearing his hero costume or blaring on about some random villain he’d defeated during night patrol. His blonde hair was messy and spread over a beige pillowcase. The bed looked so soft, it looked like home. Izuku grit his teeth. He went closer to Katsuki, a soft kiss on the lips as he left.

Chapter Text

——

Katsuki got up a few minutes after Izuku left. He still, for some unbeknownst reason, felt normal. It didn’t feel like his heat was arriving today and the pre-heat symptoms hadn’t shown much sign of progression. The only large differences were his horniness, and the fact that he kept thinking of more ways to make Izuku happy. Wishing for his partners happiness, that was inevitable in a healthy relationship of course. But Katsuki’s mind kept wandering to the idea of making Katsudon, or spending thousands on All Might merchandise or buying cheesy ‘Hero Deku’ clothes, and surprising Izuku with them on(hoping he'd rip them off). 

Regardless, Katsuki was in the mood to serve Izuku’s every want. Tailor his day and schedule to suit Izuku’s, and that feeling was so unorthodox it almost scared him. 

Maybe he’ll go and get some more chives and they’re almost out of eggs. The kitchen cabinets were mostly empty. Onions are also needed— he opened another drawer— and chili peppers. His mental list only grew larger. They’ve both been at home growing more accustomed to the changes, despite this free period, neither of them have any true understanding of their current secondary gender. Honestly, Katsuki had only gotten more confused. At first he was indifferent, then very horny and now he feels giddy at the thought of being Izuku’s servant. 

Katsuki wanted to see Izuku's face light up as he smelled the katsudon as soon as he opened the door. Izuku could ramble on and on about all the hardships he faced during the patrol as they ate, Katsuki could nod and call him a fucking idiot. It sounded like heaven. 

Katsuki didn’t understand this feeling, it was weird and domestic and made his stomach bubble with fondness. He’s been in love with Izuku for almost longer than he hasn’t. Whether that feeling was banished and stored up within the deepest voids of his chest, as it had been years ago, or if it was patent and portrayed messily across his physiognomy as in the present. It didn’t matter. The point was, he’d grown accustomed to Izuku’s love to the point that he could stare at him without blushing or wanting to curse him out. Presently, even the thought of Izuku made Katsuki queasy. 

He held the list in the front of his mind, and after doing his morning hygiene and cooking a small breakfast for himself. He was pretty much ready to leave. 

Katsuki found himself manoeuvring through seas of people on the street. Physically he hadn’t experienced any change. He was still roughly five-foot-ten, his muscles appeared as dense and plentiful as when he was an alpha. Mentally? He was a different person. Besides the horniness and weird, service-kink he’s seemed to have developed overnight, he felt weirdly vulnerable when in public. 

Alphas were like hounds. Their ears perked up as soon as Katsuki turned a corner, tails swooshing and plying in blurred arousal. It was disgusting to see, moreso angering. Katsuki wanted to kill them. Even with the undoubted expression of vexation on his face, the unmoving scowl, they failed to feel the overwhelming presence of his anger, if they did feel it, they didn’t care. To them, he was a commodity; meat and flesh about to be tossed into a lion's den. It felt more than dehumanising. Katsuki would say that he’s conscious of the issues in the world, but hell, if omegas have been objectified and demeaned so much by simply walking outside, then of course they’re so skeptical of those who want to help them. 

Katsuki walked further down the street, thankful that he took his mother’s advice to live close to a super-market. Alpha’s growled at him, teeth bared. Katsuki was still new to this whole omega thing. His heat was near which amplified his scent, and he wasn’t sure how to mask or dull his scent, which definitely made matters worse for him. But even so, his smell was currently vile and angry. It screamed ‘fuck off’, yet these visceral beasts couldn’t take the hint. 

Other omegas even glanced at him, some judgementally, they can die, and others with sympathetic understanding. Finally inside the shop he could unravel his mental list, picking item after item, scrutinising each option to find what’s a better spend of his money. He spent an— overly generous amount on the ingredients to make Katsudon. He needed this to be perfect for when Izuku came back home. 

The light breeze enclosed him as he stepped into the exposed world again. Alpha’s heads slowly craned into his vicinity, and Katsuki understood why Izuku always begged the alpha to scent him constantly. As a matter of fact, when Izuku arrives home, Katsuki will demand he do the same to him. 

He crossed the road once the cars stilled, ignoring the creepy alleyway. He and Izuku always joked about it being haunted. He passed it with indifference, the wind howling behind him carried a premonition and Katsuki increased his pace. 

Turning the corner to the pavement parallel to the alley, he heard it. 

mmph— hey…stop…

He was already running back before the last word could leave the potential victim’s mouth. As he got closer, the pleads only got more coherent. They were muffled, as if a hand was pressed over their mouth, or a hand firmly clasped around their neck. Katsuki cursed his day, the grocery bags rustling as they dropped onto the ground, rolling half a foot before going stationary. 

Katsuki was panting, he half consciously ran there, the other half led by pure instinct and reflexes. 

st..stop it! I don’t want— get off!

The noises were clear now, they were undoubted. Katsuki propelled himself towards the conflict. The smell was strong, it was obvious now, a vile, putrid stench. Katsuki gagged almost. It smelt like expired, fermented milk, gone sour with age. That smell was then mixed with the thick smell of sweat and unwashed flesh. Katsuki had to breathe through his mouth. 

Finally after a while too long he could see the omega. They seemed to be older than Katsuki, but not by a margin, maybe a bit under a decade. The alpha was growling, possibly in rut, further solidifying the need to save this omega, who was pinned down by the sickening bulk. 

Usually Katsuki would shout, charge in, loud boots thumping on the ground with patent blood-lust. He did neither. Suddenly the conscious decision wasn’t to make his presence large, it was actually the opposite. Katsuki made himself invisible; he propelled his body up onto the top of the builds that surrounded the alley. He could see the attempted rape from below and it made his blood boil. 

Maybe it was a bit excessive, he didn’t have to Howitzer Impact the alpha the second he was a respectable distance away from the omega. The criminal was immediately knocked out, the little hair he had seemed to be toasted off in the flames. As for his physical condition, it was far from peak, getting vertically slammed into concrete was no easily treatable injury. He fell funny and appeared to be a bit mangled, his arm was definitely— injured..dislocated or simply snapped? Katsuki couldn’t tell. Unfortunately, the bastard wasn’t dead, if only Katsuki was in his hero costume, the addition of his gauntlets would’ve instantly killed the criminal. 

“What a dumbass.” Katsuki turned. Unconsciously, everything about him softened, his brows lost their natural furrow and his eyes were no longer blown out in adrenaline. The omega looked terrified, the lady was shaking nonstop, all her body gone restless with fear and pain. She was peering at Katsuki from the ground, and Katsuki had dealt with these kinds of crimes. Creepy, vile alphas who have watched too much porn, ones with superiority complexes and those who are not keeping track of their cycle and thus, putting everyone else in danger— they all disgust him. 

The woman hadn't moved from her sitting spot. Her mouth was wide open, but the entire time not a sound left it besides uneven pants. Katsuki felt no annoyance, he didn’t hold any arms out besides keeping them in sight. The women trembled, Katsuki slowly walked to her, it was much easier to comfort a panicking omega, when Katsuki himself was an omega. 

She didn’t fight nor cry despite the look of abject terror in her eyes. Katsuki made his pheromones exude, he didn’t look like an omega at all— not a stereotypical one at least. 

“It’s okay, you’re safe now.” He took his hero badge out, showing badges and evidence of responsibility did little to ease the mind, especially when so many alphas in command exploited their roles. Still, he held the badge out, walking slow and evenly. Of course, it’s only natural that he wouldn’t be trusted immediately. He put his arms up lowering his head in a sign of weakness. The woman was clearly in shock; Katsuki would’ve refrained from any physical contact if this weren’t an emergency.

He tried to exude more calming pheromones, but as Katsuki still didn’t really understand each mechanism of the omega body, he wasn’t certain of how effective this was. The woman was still gasping, eyes no longer blown out in horror but there was no other sign of improvement. 

“Please…breathe.” He whispered, keeping his distance as he stood across from her. It was futile trying to converse with her, still, Katsuki persevered somewhat. “I’ll get you to the hospital okay? You’re going to be okay..” He said, ringing his own personal doctor. The professional was a skilled all-rounder from aiding Katsuki after difficult fights, to helping Izuku recover after being assaulted once on a night out. 

The woman hardly moved, she hadn’t blinked in a while, however her glass eyes finally cracked as tears spilt out. Katsuki didn't judge her or question her mental solidity, still, while he understood her autonomy and trauma-based responses. He needed to get her to safety. 

Scooping the women in his arms went unspoken, she shivered as if an avalanche hit and Katsuki, based on pure visceral instinct brought her face to his neck. An omega’s scent was therapeutic, Katsuki could remember when he’d be in a particularly sour mood and Izuku would try to use his scent to sooth him. Katsuki couldn’t really smell it much and due to Izuku’s scent being particularly faint, it didn’t have much of a mental effect, still Katsuki could feel his body being rewired into a more comforting state.. 

He ran to the hospital. He’d have used his explosions to catapult himself up; however he didn’t want to risk potentially traumatizing the women any more than she already was. 

Izuku hated hospitals, whenever they went to one he’d rant about their sick, pungent stench, how life and death both occurred in the same very building— he hated it. 

Katsuki had grown to hold the same detestment towards hospitals as Izuku had. When the war was over and Izuku had to wake up disoriented and alone in the hospital, engulfed in the same smell he hated so much. Katsuki couldn’t even imagine how he felt. Throwing away his dream goal for a corrupt society..—for what? Hardly any praise? It pissed him off. Katsuki hates hospitals too now, everything about them. They remind him of when Izuku would give it all for the sake of a random person. He was so reckless, they both still are. It’s difficult staying up at night worrying over whether Izuku would come home safely or if Katsuki was about to get a phone call from the hospital. 

“No…wait, not the hospital, I'm fine.” The woman muttered her first words. 

“What?” Katsuki responded before remembering how the justice system treated omegas, and any kind of sex-related crime as a matter of fact. It was vile how little they cared about serious offenses such as rape and sexual abuse. Even with a testimony built with evidence and validity, to the judges, it was all irrelevant folly. Furthermore many people in society still followed traditional norms. They withheld expectations on omegas being obedient and paternal, many(especially alphas), believed that omegas were more similar to household commodities than people. It makes sense that they wouldn’t see police forces and government-led groups as a safe space. 

“Drop me! Just—”

Katsuki could hear the panic in her voice as he dropped her onto the ground, the woman stumbled slightly before catching her balance and her breath. 

“You’re a hero aren’t you, Dynamight.” —She questioned—“Are you able to drop me at home, my mate should be there.”  Katsuki nodded. 

“Can I lift you up?” 

“You already have before.”

Conversation was naturally strained and Katsuki didn’t try to initiate it any further. As he held the woman she seemed far more comfortable, she’d even unconsciously lean into his scent. He carried her back home and thanked God that Izuku knew how to fight off those kind of heinious criminals. 

She didn’t really thank him, she didn’t speak much at all. Her mate was a beta, the man was disconcerted and restless as soon as he opened the door. He eyed Katsuki with valid scepticism but the blonde didn’t respond with any anger. He wondered if that’s how he looked to the doctors whenever Izuku was hospitalised. Behind all his shouting and empty threats, he was just plagued with concern. 

This beta muttered a small sign of gratitude before he coddled the women. He didn’t spare Katsuki another glance, he didn’t turn to him or shake his hand or anything similar. It was as if he wasn’t there, the door was shut in his face and he could hear the man’s worried comfort.

— 

Katsuki for the first time, experienced the small but sure advantages to being an omega. If he was an alpha— as he usually is— the women would probably not have let him get near her. He wouldn’t have even been able to sooth her with his scent. Katsuki had never experienced this side of heroism, it felt much more intimate and even when the door got basically slammed in his face, he still felt the satisfaction of helping someone. 

His mind wandered back to the food; he was going to make Katsudon but left all the shopping in that alleyway by the supermarket. Currently the thought of cooking bored a crater into his stomach. Katsuki used his explosions and quickly arrived at the initial alleyway, the food was still there, its contents jumbled and laying in unorganized rows over one another. Katsuki took the packaged goods and other salvageable items(as some had spilled out their packaging). 

On the way home he thought of the woman and Izuku. Maybe Izuku was worried for him right now, some weird intangible foreboding sent by Katsuki’s anger towards the criminal. It was always like that, Katsuki could remember after the war occasionally, as they browsed the news Katsuki would always feel pangs of longing and unrequited interest in his chest. That was before he was even aware that Izuku was his mate, while he had his suspicions, back then he’d probably call them premonitions…or foreboding; he banished the evil thoughts to the most derelict parts of his cortex. Honestly Katsuki was at first upset when he solidified the ‘Deku may be my mate’ theory. It didn’t make sense to him. Izuku was always, well— Deku. Katsuki was Katsuki, he was himself, and in himself and his body Deku served no purpose. 

Now he can’t even last a day, hell, not even an hour, without thinking of Izuku. Honestly, murder him if he ever does last that long, because that is not Katsuki. 

—

He sighed as he emptied the shopping basket, it seemed to have lost a quarter of its initial weight. The onions and chilli peppers were untouched, but unfortunately the eggs were cracked and had to be tossed. 

Katsuki took his chopping board out, turning on some classical music(don’t judge him, judge his father)to relax for the day. He ignored the weird stomach feeling he’d occasionally get as he cooked. He must be hungry or something and although the feeling was nothing similar to peckishness, he chose to stick with that answer. 

He estimated the time based on how many musical pieces passed by. By the time he cooked the rice for the katsudon around eight had gone by. Katsuki loved cooking. The work and time put into the cooking always annoyed him when compared to how fast Izuku ate it all. He’d always end up snotty nosed and teary eyed due to the spiciness, even after Katsuki made a separate, less spicy, bowl for him. 

For some weird enigmatic reason, Katsuki put a quarter of the spice in the dish as normal. He added more spring onion than he’d usually prefer and let the rice simmer for longer than typical. 

9:57— Izuku would be home in a half-hour or so, heroes always worked overtime so it was difficult and almost futile to have expectations for when the alpha would be back. 

He ended up finishing the cooking at around 10:37, Izuku still wasn't home and Katsuki began to get frustrated that Izuku hadn’t informed him of the potential late stay(even though he’s probably mid action or exhausted), and worried because of the same reason. He wanted Izuku to eat the food while it was hot, it was the most tasty then after all. Still, the time is increasing while the food unfortunately cools. 

Katsuki didn’t let himself loiter and wallow in his desperacy like a touch-starved housewife. Instead he went up to their shared office, despite Katsuki’s natural adeptness at organisation and punctuality, and Izuku living with him since they were twenty-two, Izuku is still the same clumsy, haphazard man he’s always been. Katsuki guessed that when people said ‘the longer you are with someone, the more you begin to act like them’, it didn’t apply to them much outside of battle. 

Izuku had a pile up of paperwork that needed filling out, mostly just simple accounts and reports of crime scenes, or quirks of villains that needed to be added to the database. Katsuki welcomed himself onto Izuku’s computer and got himself busy. He tried to fill in his mental void and persistent yearning with clicks of the keyboard but they didn’t even stifle half his thoughts. He took his pen out, shaking it before writing a short summary of the events in some of Izuku’s missions. Due to some reason, could it have been some late effects of Izuku’s cooking? His stomach hurt and he had weird sharp pains, still, heroes never give up so Katsuki pushed the pains aside. 

He couldn’t even imagine how omegas could work when in any state similar to one he was in. At the moment he was..how would he put it— aware? He was aware of his body, fully conscious and almost mentally symmetrical to his usual thoughts, but something felt off. It wasn’t him, it was his instincts and priorities that were completely skewered. At the moment if Katsuki and Izuku were both fighting alongside each other, Katsuki would probably be more focused on how Izuku’s hero costume wrapped so snug and tight around his muscles. 

Recently his mind has been blaring to him, whispering brain-dead, idiotic thoughts about kids and family and folly along those lines. 

Someone mentally, as he was currently, they were in no place to fight in battle, and his heat hadn’t even hit yet. He could hardly do paper work, nothing quenched his desperacy. He needed Izuku’s— 

What’s wrong with him? 

——

This is what he needed. Katsuki dipped into the cold tub, it was a mistake, it felt like he was stuck in Todoroki’s ice and the coldness was going to infiltrate his body leaving his joints stiff and gaunt. He let out an embarrassing squeal as he lowered the rest of his body into the tub. He wonders what Izuku was doing— maybe he had already captured the villain and was restraining them in blackwhip…Izuku could control the blackwhip so well now, Katsuki wondered if he could use it during sex. He could probably wrap them around Katsuki's ankles to keep them open, fuck he wanted it so bad. 

Would Izuku be even more aggressive? Katsuki stepped out of the tub, it was a pitiful attempt to remove his erection. Now he was just cold and very horny. He dried off and changed into some loose clothes. It was 11:09 and Izuku was nowhere to be found, Katsuki ignored his arousal and instead went to refrigerate the katsudon. 

——

How do you act like you aren’t excited to see someone? Despite Katsuki’s increased self-awareness, he was far too prideful to truly showcase the euphoria he experienced when the front door clicked open. 

Izuku entered the house, it was quiet but the scents were strong. He could smell Katsuki, the smell was so intense and Izuku almost thought the omega was in actual heat. It circled the room in thick swashes and Izuku felt light and hazy. 

Katsuki— his omega— finally showed himself, plying down the stairs perfunctorily. He looked good, had he just showered? Damp blonde hair glued down to his forehead, and his shirt hung low, his trousers the same, revealing his strong hips and shoulders. Izuku let out an unheralded breath. 

“You’re looking at me all stupid, Izuku.” Katsuki grinned. The tease knew what he was doing to Izuku. Katsuki also looked desperate, he looked at him with wanton arousal and even with Katsuki’s honed ability to put on a perfect facade of anger and rage, his eyes were struck with unassailable lust. “If you want to do something then fucking do it.” 

Izuku’s body aches from battle. He hadn’t worked in a while, due to his pre-heat symptoms, diving into combat wore his body down far more than he expected. Still his cock stirred in its confinement. The first nudge towards sex after their change in secondary gender was finally made.

And if he wants something he should take it? 

How could Katsuki say something so suggestive to him when he’s still reckless and unaccustomed to being an alpha. Want and need mixed up in his mind until either was distinguishable from the other. The need to take and claim his omega surfaced tenfold as strong, and Katsuki was just standing there, smug lips curled into a smirk. 

Katsuki left himself vulnerable, like an unspoken plea to Izuku, begging the alpha to take him. Izuku was far too deep to refuse him the pleasure. 

Their lips met in a hurried race to one another, both of them fulfilling the pent up urge that they had been ruminating on. Izuku needed to feel him deeper, he needed to be inside him. 

It wasn’t long at all before the alpha’s tongue was rubbing against Katsuki’s own, the warmth that connected them was so intimate, so spontaneous and Izuku craved more. Neither of them pulled away, and they didn’t plan on until both were panting for air. Katsuki walked forward, pushing Izuku the opposite direction until his back was against the door, to which their passion continued.

Izuku groped Katsuki’s chest, eliciting a deep groan out the omega. 

“Fuck..” Katsuki broke the kiss, his face flush as he panted, “Let’s go to the bedroom.” He pulled Izuku along, each second where their bodies weren’t pressed together and interlinked felt like a waste of time. 

The bedroom was flung open and Katsuki pressed Izuku’s body down into the mattress. 

“Kacchan..I’m tired— I don’t know if we should go all the way.” He grumbled as Katsuki crawled onto his crotch, his weight heavy against his cock as he tried to coalesce any rational thought. 

“Your cock says different Izuku, you need to be honest.” Katsuki hummed, grinding against the alpha as he leaned down so their clothed chests could slide against each other's. 

“Still, your heat, this could easily trigger it.” 

“Then you’d just have to cancel tomorrow and fuck me until it’s over isn’t it Izuku?” 

Izuku was so hard, his cock throbbed, begging to be freed, and if Katsuki persisted any more, it was going to get its way. The blonde's knee bent up, its hard surface ground against Izuku’s crotch and the noise he let out could only be described as filthy. His mouth opened, letting out an elongated sigh of arousal as Katsuki applied more pressure. 

“Fuck me Izuku, I wont beg if that’s what you want.” 

He didn’t even have to, with a surge of adrenaline Izuku’s hands manoeuvred to grip Katsuki’s face, pressing their lips back together. It was uncoordinated, so uncoordinated and sloppy. Spit was smeared over Izuku’s lips giving them a glossed effect, Katsuki matched the pace as well he could, biting down lightly on Izuku’s lip until the alpha finally parted them wider. 

Their tongues rubbed and slid together. It was all so slick and messy, full of once restricted lust and uncertainty. Katsuki moaned into the kiss, his hips bucking forward against Izuku’s crotch so he could rub his hard bulge against the strained cloth. Izuku wasn’t any better at all, his eyes were glazed with pleasure and he looked at Katsuki as if he was about to swallow him whole. Katsuki broke apart to gaze at the alpha under him. Fuck, Izuku looked a mess, his cheeks were red and his lips puffy from attention. When Katsuki broke apart the alpha let out a low groan, he opened his mouth wider as if the current contact wasn’t enough at all. 

Katsuki went to tease him, he rocked back and forth on the throbbing bulge under him. 

“Kacchan, please.” 

Katsuki wasn’t sure what Izuku was begging for, him to go faster? apply more pressure? He was left in the dark on the answer. Instead he swung one leg off of Izuku’s body, crouching by him as he slowly took his costume off. The alpha’s skin was glazed with sweat and Katsuki needed to get his tongue on the saltiness fast, he needed every inch, hell, centimetre, of Izuku’s body to be praised by his tongue. The almost spandex-like material clung to his skin, the sweat only sticking it down more on the pale canvas. 

“I’m trying, stupid fucking costu—” 

Izuku had to fully stop for a while and remove his hero costume before Katsuki pried and ripped it off. The blonde sat on the end of the bed impatiently, his eyes doing laps up and down Izuku’s body, his gaze lingering on the patent tent around his crotch. It bulged out so beautifully, straining the material around it and Katsuki so badly wanted to press his face into that bulge and lap at it until Izuku was a whining mess.

Izuku, too focussed on removing the persistent costume, didn’t notice Katsuki’s smitten love-heart eyes.

The alpha took one leg out of the tight garments, once one was out Izuku slid the other out with ease. His finger caught on the band of his boxers, tugging them down alongside the cloth. His cock bobbed free, dripping precum that had been evident with the soaked circle on his boxers. Katsuki wanted to wrap his lips around that faucet and drink up whatever it offered. 

“Kacchan, are alphas normally so— wet? He said, cringing at the seemingly inexperienced question. Katsuki felt like his legs were jello, his bones gone weak and numb with lust and desperacy so all he could do was stare at Izuku wantonly. Still, he shook his head. Alphas didn’t usually drip so much precum, their anatomy made the main indicator of their arousal their knots and size, much less than their wetness; they weren’t omegas after all. 

Izuku was dripping, the precum had leaked down his shaft in thick lines, streaking down his balls. Finally the alpha was fully naked, Katsuki’s mouth watered as he stared at the thick cock. He never wanted it in his mouth so badly, was this due to his heat being near? He took the moment to remove his own clothes, the loose shorts falling down his legs as he took his shirt off. They were now both fully naked now, the room smelt like a mix of their new scents and the unfamiliar arousal only made Katsuki cock harder. 

“Izuku— Izuku….”

“I’m here Kacchan, I’m gonna make you feel good okay?” 

Katsuki went down onto his back, widening his legs so Izuku could crawl between them. 

“Spread them a bit wider.” Katsuki heard what he said but his legs were boneless so instead he let out a humiliating whine. Izuku took the initiative and held Katsuki’s knees, opening them up and shuffling closer until his erection was rubbing against Katsuki’s own. It was so hot, they were both sweating as the pent-up desire for sex finally began to seep out. The blonde’s legs shook, he needed to keep them open for Izuku. He was so fixated on his cock, it was so thick, Katsuki needed it inside his mouth, ass, just inside him anywhere. 

Izuku stretched a hand around both their erections, his hips rocking up and down as he thrust his cock against the omega’s own. 

Katsuki was needy, his hands seemed to be indecisive in what to do so his fists clenched and unclenched, grabbing onto the duvet, Izuku’s hair, his back— anything. 

It sounded so slick, Izuku’s precum had leaked down onto Katsuki’s cock, only adding more wetness to their sex. It’s been so long since they’ve had sex like this. Hell, it’s been long since they have done anything remotely sexual. Both too busy trying to get accustomed to their new biological changes to risk having sex. Now Katsuki could see he’s been missing out. Was he in heat? He couldn’t tell, perhaps that meant he wasn’t. He tried to match Izuku’s rhythm and move his own hips, but it was uncoordinated, he buckled his hips up over and over again instead. Izuku’s cock wasn’t even as big as Katsuki’s, it wasn’t even as thick, so how could it have such an effect on him?

Izuku tightened his palm, adding pressure around their cocks as he rubbed them together. Katsuki’s legs fell open wider, his mouth opening as he let go of any shame he may have had. 

His eyelids fluttered as he took in the view of his lover; he was beautiful. Izuku’s hair had stuck to the sweat on his forehead, he was red faced and he was panting as well.

“So pretty…so— so pretty.” He moaned, his head thrown back as he laid exposed for Izuku, the alpha leaned down as much as humanely possible while maintaining the thrusts, his nose digging into Katsuki’s scent gland as he took large inhales. 

“You’re even prettier Kacchan, wish you could see yourself.” His green eyes gleamed and Katsuki felt so loved, he felt the emotion engulf his trembling body, through Izuku’s scent, through each of his visceral actions. He yearned for more closure. 

He felt something strange and suddenly the thrusts halted, leaving him writhing in the aftermath of the intense pleasure. 

“Izuku..”

The weird feelings continued, but Katsuki ignored it, he felt too good, and he was too sexually frustrated. The blonde was about to close his legs when they were pried back open forcefully. 

“Kacchan..you’re—” Katsuki was pissed, the alpha stopped their sex for what? To stare at him entranced and mutter indecipherably?

“I’m what Izuku?”

“The..”— Suddenly he seemed to get nervous, his face getting a deep shade of red but out of humiliation and less lust.—“Uhm..the slick, you’re uh..really wet” He muttered out, cringing at each word. 

Katsuki shuffled, and as soon as he changed his position and lowered his hips, it was prominent. The mattress was almost soaked, the wet spot in it had been growing and as he automatically raised his hips again to avoid the wetness, the slick stuck to him in a thin line. 

Izuku let out a shuddered breath, he was going to break at this rate and fuck Katsuki into the mattress, this wasn’t good. 

Katsuki’s hole leaked the slick out, it smelt just like his scent, it was dripping out steadily and fast. 

“Kacchan you’d let me inside right? I can fuck you now?” He asked, holding Katsuki’s legs open, eyes glued to the sight.

“Stop looking at it.” Katsuki said. His hands went up to shield his face from embarrassment but it was too late. The blonde felt humiliated and almost nervous, he could feel the wetness now, it leaked down his ass adding another patch onto the covers.

He couldn’t see much under the self-made blindfold, but he could feel Izuku’s eyes still on him. 

“I’m sorry Kacchan I need to feel you around me—I’m going to add a finger.” He didn’t waste time, the digit was circling his rim, teasing him exactly how Katsuki did before fingering Izuku. It dipped in with ease before the light stimulation was gone. Katsuki removed his hands in time to see Izuku sucking the slick-coating off his fingers, it only made the blonde flush harder. 

He wanted to respond with disgust to the action but he couldn’t get it in himself to lie, especially when his cock twitched, and dripped precum as a response. Izuku groaned at the taste, scooping some of his slick with two fingers before repeating the action. 

“Izuku put them in already.” 

The alpha so desperately wanted to tease him more but he was too hard and horny to, thrusting the two fingers into Katsuki. The blonde’s body seemed to swallow the digits, it was so hot and wet as Izuku went down to the knuckle. 

“Izuku— Izuku, fuck.” He cursed, his hands flying up to cover his face as his eyes threatened to roll back. It was too filthy, the blonde had never made such an erotic face. His fingers parted enough for him to see Izuku’s grin, the alpha dragged the fingers out slowly before plunging them back into him, ripping a carnal moan from Katsuki’s lips. Izuku laughed, pulling the digits out before thrusting them right back in with a sloppy noise. He began to find a rhythm, thrusting slow but hard into his body. Every plunge of his fingers would create a wet squelch from Katsuki’s slick, the noise was filthy and messy, only highlighting Katsuki’s arousal as the slick dripped out of him, running down his hole onto the bedsheets. 

His face was flushed red with embarrassment. Those noises were coming from him? It was proven by the next pump of Izuku’s fingers. He was so stretched out by the digits and only two were inside him. Fortunately, due to his arousal and need, he was probably as loose as an omega could possibly be during their first….near-heat sex—if that was a thing—but still, his entrance clung to the fingers, coating them in more, and more slick. 

If this was how two fingers felt, how would three feel? How would Izuku’s cock feel? 

It’s not like Katsuki wasn’t experienced with anal sex. He’s been on, and has enjoyed, both the receiving and giving side of it. This felt the same but it was as if his desperacy and neediness had amplified the feeling, leaving his entire body sensitive to a single touch from Izuku.

“Someone's needy, why don’t you be honest now Kacchan?” 

The fingers left and Katsuki removed his hand off his face. What was Izuku doing?! His brows furrowed in frustration as he glared him down. Izuku had already ruined one of his orgasms before, he must’ve been doing this on purpose.

“Izuku, what the hell do yo—— Ahh, oh…fuck..” His complaint turned into a loud moan of pleasure as three fingers were pressed into him. The words were jabbed and replaced by humiliating whimpers as Katsuki lost control of his body for a second, his eyes rolling back dazed and unfocused before he caught himself again. His hand was about to go on his face, but Izuku predicted it, holding Katsuki’s wrists with one hand so they were restrained over his head. That slick wet noise was back and loud, filling up the room.

He opened his eyes and Izuku’s lips were still curled into a grin. Katsuki could feel the stretch, it felt so good, a perfect mix of pleasure, some pain and Katsuki needed more. His cock was dripping, adding to the slick and he couldn’t even imagine how he appeared for Izuku, who stared down at him with lust; he sped up his fingers, the digits moving at a steady fast pace. 

“Fuck…fuck— Izuku..keep going just like that.” Katsuki’s mouth fell open, moans pouring out as his fists clenched around the bedsheets. He couldn’t move if he wanted to, Izuku’s fingers were deep inside him so closing his legs wouldn’t affect anything; his face was exposed as well, his limbs too weak to break free from his restraints. Izuku’s cock would rip him apart. Looking at it now, despite the average size, the girth of it was unexplected. Izuku would pound him so good, then his knot, Katsuki needed it to pop inside him, he needed Izuku as close as possible as he fucked his cum into him. 

The alpha suddenly curled his fingers up and Katsuki screamed, his prostate was hit directly, his legs felt non-existent, they shook in the air weakly as he moaned. 

Izuku just chuckled slightly, the next hard thrust and Katsuki’s back arched into the air, legs finally giving out as they sank into the mattress. The omega’s hands were still restrained over his head, exposing the visceral lust on his face to Izuku. 

Izuku began to abuse that spot and Katsuki couldn’t take it..his brain was going to melt, his body— whatever had infected his legs was slowly creeping through the rest of his body, leaving him a fuzzy pleasured mess. 

“Izuku…Izuku—izuku..wanna cum…make me cum..”

And who was Izuku to deny him a third time? He lifted Katsuki’s hips up, the poor man was shaking with pleasure, moaning and whimpering quietly as he pleaded for release. 

—*RING* *RING*

Izuku ignored it; however his pace faltered as his eyes trailed back to his phone. He put his attention back onto his beautiful husband, deciding to finish him off fast.

“Izuku wanna cum to your cock not fingers…Want— your cock.” 

*RING* *RING* 

They both ignored it despite its persistence. It wasn’t important right now. What was important was Katsuki’s splayed body on the mattress, how his cock twitched and dripped every touch, how his face was flushed and so cute with arousal—That’s what mattered. Izuku grabbed Katsuki’s waist, flipping him around so the blonde landed back-first into the mattress. 

“You’re so sexy Kacchan, so wet for me..you don’t even need lube do you?” He grinned, holding Katsuki’s legs open and spreading them wider, giving himself a better view of the slightly gaped, dripping hole. 

*RING* *RIIIING*

“Why didn’t you fucking silence that thing? Fuck sake Izuku, put it on do not disturb!!” Katsuki snapped, pushing Izuku off of him to see the nuisance.

“I didn’t expect anyone to call.” 

“Still, you don’t want the phone ringing while you’re balls deep inside me.”

Izuku groaned, the thought of being so deep in Katsuki was going to make his mind all weak again, and Katsuki was still nake—

“Izuku!”

“I’m sorry okay? I just didn’t really think I’d get any calls.”

Katsuki sighed in vexation, he was fucking frustrated and Izuku’s phone was damn determined. 

“Ka—”

*RING* *RING*

“Just pick it up already!” Katsuki rolled his eyes in annoyance, his erection still hard and leaking as he sat up.

He watched as Izuku sighed, grabbing his phone off the bed-side table. Katsuki wanted someone, anything to be pissed about..it wasn't really Izuku’s fault for unintentionally cockblocking him but still, someone had to take the blame. 

Izuku talked on the phone for a while, his expression becoming increasingly bleak as each word left his mouth. His eyes flicked back to Katsuki occasionally and the blonde sighed. 

He reminded himself, this is the main thing he wants for Izuku. He didn’t do this for sex, and masturbation was always an option. So he wasn’t shocked when the alpha went off the call, pity and guilt seemed to gnaw his brain so much it showed physically. 

“I'm sorry Kacchan, I have to go, Shouto needs serious backup.” He said, leaving his phone on the counter as he hurried to the bathroom to clean himself up to something adequate. Luckily, for Izuku his arousal had decreased tenfold upon hearing the message but he could smell Katsuki so strongly, even from the confines of the locked bathroom. He needed to work, Shouto needed help and as much as Izuku loved sex, it didn’t go above the life of his friends. 

“It’s okay Izuku just go.” Katsuki grumbled from behind the door, he was standing up, his legs still shaking slightly as he looked around for his clothes. He needed a shower—again, he was soaked with slick, and the bedsheets needed a change.

Once found, he lounged lazily on the bed, ignoring the persuasive idea of calling Izuku back and running his fingers through the soft green curls, instead feigning anger with a hyperbolized scowl to cement the mask. Izuku smiled the entire time, before he left he pressed a warm kiss of solace onto Katsuki’s forehead, then his nose and finally his lips. 

Katsuki grit his teeth, he felt no anger at all, the kisses only made his stomach bubble with giddiness. Regardless, any anger he’d have felt would be deemed as irrational. This is what he wanted isn’t it? For Izuku to be able to work. Katsuki didn’t want to be selfish right now, so of course, with acquiescence, he let Izuku leave. 

——

How do you admit that you don’t want your husband to follow through with something that genuinely benefits him? That’s selfish isn’t it? Katsuki’s mind, heart, it all yearned for Izuku’s proximity, even a modicum of closeness made his mind waver. He’s never been so desperate for it and jerking himself off to the thought of Izuku’s touch wasn’t the same at all. 

Izuku deserved this. It was a fact he repeated to himself, he knew it was true but the neediness and greed for the alpha kept building in his mind. 

It’s probably because his heat is near, bullshit hormones and what not. His body crumpled into the fetal position and Katsuki felt like all the sadness and dejection had ensembled in his mind. This was stupid shit, he was being irrational and unlike himself, what the fuck was this feeling? 

Izuku had to put work first, regardless of trivial mundanities like their sex. Katsuki knew this. He knows Izuku had to leave, especially as a friends life was in danger. Katsuki didn’t understand his feelings, he felt completely estranged and rejected, as if Izuku chose to leave him over a small thing.

Its not a big deal that Izuku left. Katsuki was not insecure.

Izuku hadn’t returned back, even after two hours. Katsuki wasn’t sure what he expected—Izuku to come back and finish him off? Foolishness. He felt far too embarrassed and frustrated to bring himself to orgasm so instead he let his body sink into the foam mattress. Taking deep inhales as he rolled onto Izuku’s side on the bed, shoving his face into the pillow and letting that rich leathery smell surround him, it smelt like safety.  Finding comfort in its indirect warmth as the night enclosed around the bedroom.