Chapter Text
The first way Katsuki decided to fuck with Eijirou was super easy, simply by walking around the house without a shirt on. It was normal for them to do it but Katsuki opted to wear a pair of dark gray sweatpants that had a longer than normal waist band that hugged his hips just right. He tugged them down till the first glimpse of public hair was showing, allowing his clean cut V line to hollow against the fabric.
He’d never noticed if Eijirou was looking at him, having given up on his crush a long time ago but now he was hyper focused as he threw open his door and trudged to the kitchen. As if by fate, Ei was sitting on a bar stool, munching away at a massive bowl of cereal. The redhead glanced over, mumbling a curt ‘mornin’ through a mouth full of food before looking back down at his phone.
Katsuki was surprised the man didn’t break his neck with how hard he looked back up, head snapping over with an open mouth to allow a dribble of milk to spill down his chin. But just as fast it happened, he cleared his throat and looked away, fixating a little more than necessary on his cereal. It took everything in Katsuki to not laugh because he definitely didn’t miss the faint blush creeping up his ears.
“Hey man, how’d you sleep?” Katsuki mumbled through a fake yawn, pretending to sound sleepy.
“Not bad, how about you?”
“Ehh, I think I slept a little funny. My hips are sore as shit today.”
“Well, we did have a rough day on patrol yesterday so maybe it’s from that.” Eijirou muttered, shoving an extra large spoon full into his mouth.
“I dunno, could be.”
Katsuki side eyed the man as he poured himself a cup of coffee. It was amazing to him how calm the redhead seemed but the closer he looked, the more he started to notice that Eijirou was barely covering his nervousness. His leg was bouncing a bit too much to be normal and his hand holding his spoon trembled ever so slightly. Katsuki decided to push the envelope a little, just to kick things up a notch.
He grabbed his favorite jam from the fridge, throwing a couple pieces of bread into the toaster. Knowing that he wasn’t naturally clumsy, he turned his back on Eijirou, pretending to have a hard time opening the jar. With a quick twist it clicked open and he shook his hand, allowing multiple globs of purple-ish spread to splash onto his chest.
“Oh son of a bitch.” He groaned, turning back to make eye contact with the redhead. “Fucking lid got stuck and the piece of shit went everywhere.”
“At least you weren’t wearing a shirt! It totally would have stained.” Eijirou laughed.
Katsuki was thankful their kitchen was laid out how it was because the sink was dead center on the L-shape counter where the bar was, putting Eijirou directly in front of him to wash it all off. Katsuki swiped his finger through a chunk on his chest, flicking it into the sink with a ‘tsk’ under his breath. He tried his best not to look at the redhead directly but he’d be an idiot if he didn’t notice the way the man stared.
It was like his eyes were burning holes right through him, following attentively as Katsuki wet a washcloth and ran it slowly down his torso. He wet it again, making sure to leave a bit too much water and rubbed across his pecs, squeezing it so several chilly droplets rolled down, dipping into each and every curve of his abs. Katsuki glanced up, taking the risk of making eye contact but it was useless because Eijirou wasn’t even close to paying attention.
The redhead’s eyes were locked on his body, watching intently as a particular droplet went down and down and down until it disappeared into the curve of his V line and right into his pants. Eijirou gulped, spoon falling from his hand to clatter loudly against the granite countertop. The noise scared both of them, the brute jumping to his feet too fast and knocking his bowl to the floor.
“SHIT!” He barked. “Sorry, I’m sorry. I’ll clean it up.”
“Way to go, clutz.” Katsuki laughed. “You good?”
“Ahh-yeah. I’m fine, just got distracted.”
Eijirou rushed to clean up the mess, mopping it up with paper towels and disinfecting both the floor and the counter. Katsuki only felt slightly bad for teasing the man so much but after having his way with the blond god knows how many times over the last few years, the dumbass had it coming. He decided that that was enough for the time being and disappeared to his room with his breakfast to plan out how else he could make Eijirou squirm.
-
It became Katsuki's new favorite game, figuring out every little thing that drove Eijirou wild, determined to try and get the man to crack. His favorite so far was getting the redhead to help him stretch which wasn’t anything weird but he definitely pushed the envelope with it. He started asking him to help with his flexibility, settling Ei between his legs and having him force one thigh up as far as it could go.
Katsuki knew he was flexible so when it just kept going and going until his toes touched the floor, it took everything in him not to give the man a wicked grin. Instead, he opted to very subtly and under his breath, moan, which didn’t go unnoticed. The first time he did it, ruby eyes widened, the shark toothed jaw falling open as Ei’s breath caught in his throat. The second the stretch was over, the brute took off, mumbling something about needing his work out bands as he disappeared into the locker room for more than ten minutes.
Other times, Katsuki would get into Eijirou’s space, mostly in the kitchen which normally was roomy enough but with a hulking man like Ei in there, it became cramped rather quickly. Katsuki would press against his back with a hand on the man’s hip to lean around him and grab something like the salt on the other side of him. It always made the redhead shiver, staying put longer than normal before finally turning around with a heavy sigh.
He even went so far as to throw one of his jock straps in Ei’s laundry, pretending like he simply forgot it in the dryer when the redhead gave it back to him. It was adorable, the brute being a blushing, stuttering mess when he said he found it in his stuff. The first few times, Eijirou just told him he’d leave it on his bed but the last time, Katsuki never got it back.
Weeks rolled by and with every passing day, Katsuki tried to slowly up the ante. He even gave the redhead a kiss on the cheek one night when he was pretending to be drunker than he really was. It was so much fun watching Eijirou lose his cool and pop random boners at all the little pokes Katsuki made and the blond couldn’t get enough.
The sex also didn’t stop, if anything, it picked up. About a month in, Katsuki woke up four days in a row with the same familiar soreness in his ass. He was lucky enough to still be awake quite a few times, honing in his acting skills while Eijirou toyed with his body. It was impossible not to cum, the redhead fucking him slow and steady, calloused hands running over every inch of his skin they could reach.
He’d been keeping track of the positions Ei put him in, all changing depending on the clothes he wore and what mood the redhead had that day. If the man was annoyed, he faced Katsuki down on his belly, grinding him hard into the mattress. If he had a bad day, he did the exact opposite, using missionary to run his fingers through blond strands while whispering doting praise right into his ear.
One particular night, Katsuki went to bed early, laying awake for hours just waiting to see if it would happen again. Eijirou had a fine day, not good or bad in any particular way so if things were to go down, Katsuki had no idea what to expect. A lot of the time, those days were similar to the first time he'd been awake.
Almost like clockwork, as soon as midnight hit, Katsuki heard the familiar creak of his door opening and closing followed by the shift in his bed. Eijirou never said anything right away, not even checking to make sure that he was asleep which either meant that he knew Katsuki’s sleep schedule like the back of his hand or he really didn’t care if he got caught.
“Oh, look at you baby. Only wearing a jockstrap to bed, were you waiting for me?” Eijirou cooed, humping his already stiff cock between Katsuki’s bare cheeks. “Ya know, I keep finding these things in my laundry. I’m starting to think that you’re doing it on purpose.”
The redhead groaned, rubbing a hand across Katsuki’s abs as he slid his length down between plush thighs. The pressure of his sliding against the blond’s balls felt heavenly, the thick head catching on the fabric to tug it along with his motions. Even though he’d been awake so many times, Katsuki still hadn’t gotten used to trying to keep quiet. He bit his lip impossibly hard, screaming to himself that he just needed to speak up and say something but every time, he lost his resolve and surrendered to his game of pretend.
“This is such a beautiful present for me but I’m in the mood for something a little different tonight. I haven’t used your pretty little mouth in months and after some of the snarky shit you were saying today, I think you could use something to shut you up for a while.”
Katsuki nearly shuttered, body tensing slightly which he prayed went unnoticed. It wasn’t often that he woke up with his jaw sore but it did happen from time to time and he had noticed it was always on days that he’d been extra sassy. All day he’d been making little comments just to get under Eijirou’s skin, nothing rude or crossing the line but definitely pushing the envelope a little bit.
Katsuki was rolled onto his back, one pillow pulled away to drop his head a little lower. For most people, giving a blow job in their sleep would wake them up, their body naturally reacting to an intrusion in their throat but Katsuki didn’t have that problem. He’d given plenty of head in his adult life to know that he had absolutely no gag reflex so if it fit past his lips, it could go as far as the user wanted it to.
He was fully prepared for it to happen eventually but what he didn’t expect was for the redhead to straddle his head facing towards his feet. When he felt hands running over his hips, across his thighs and back up to cup his package, his body shivered against his will. His cock was pulled free, a rough hand stroking him slowly as Eijirou rocked his own hips, his shaft rubbing against the blond’s cheek lazily.
“I think you deserve a little attention too. Fucking love this pretty little cock of yours. Maybe next time I’ll ride you for a change, god it’s been so long since I’ve had you in my ass.”
Katsuki’s eyes flew open, mainly in disbelief that Eijirou would want to bottom. He had always assumed that the brute was a hard top, drawing the line at maybe a little ass play but never being willing to go all the way. Just the thought had Katsuki’s mind racing with all the potential things they could do together, the biggest one being punishing the redhead by railing his brains out for these late night escapades in his sleep.
It was a miracle Katsuki got his eyes closed in time as Eijirou shifted, lifting a leg to reach back and pinch his nose closed. It took a few seconds before the natural instinct to breathe had him opening his mouth, the head of Ei’s cock catching on his bottom lip. He did his best to not go right in for it, his horniness demanding that he start to suck but his brain repeating over and over that he needed to keep his jaw slack.
“Open wide, Kats. Take daddy’s meat in nice and deep for me. Ooooohhhh… That’s it, baby boy.”
Inch after inch, Eijirou pushed forward, the plush tip gliding slowly against Katsuki’s tongue and right into the back of his throat. The redhead pulled back, groaning as it slowly got wetter and wetter with each passing hump. Once satisfied, Ei put his leg back down, about half his length filling just Katsuki’s mouth. He returned his attention on the blond’s cock, licking a fat stripe from base to head before mirroring the action and taking it all the way to the base in one go.
Come to find out, Eijirou did have a gag reflex, literally choking himself on the shaft for a few seconds before pulling back for a breath. He repeated the motion, his own hips completely still as he gagged and coughed quietly, all the while slobbering a puddle into Katsuki’s abdomen. It was by far one of the hottest things the blond had ever been a part of, getting to cock warm the brute while his own dick nearly suffocated him.
Out of nowhere, Eijirou’s hips started moving, humping lazily to pull out before fucking down with minimal force. After a minute, he pushed farther, forcing nearly the entire length down Katsuki’s throat and the blond damn near moaned with pleasure. He blinked his eyes open, watching as Eijirou heavy, stout balls swung languidly directly above his eyes.
“Fuck, baby. Your throat is so god damn tight.”
The redhead kept the pace slow, keeping a majority of his cock wedged deep inside Katsuki’s gullet. For anyone other than the blond, they’d be coughing and gagging, fighting to get away from the massive intrusion but for Katsuki? He simply sat there, reveling in the feeling of Eijirou’s bulbous tip forcing his windpipe to stretch farther than normal. It was so hard to not close his lips, every ounce of his being telling him to stay still despite his instincts begging to take control.
He wasn’t sure how long they stayed there, Eijirou fucking his face while showing special attention to Katsuki’s cock. But eventually, the redhead sat up rocking and and forth a couple more times before raising up to pull his length free. Katsuki did his best not to gasp, simply taking a couple deep breaths as he smacked his mouth, rolling his head to the side.
“You did so good for me, Kats. You really are the best at taking my cock in every way.”
Eijirou flipped around, hovering over him to grind their slobbery shafts together. Katsuki felt a hand on his chin, his face being turned back to center as calloused fingers pinched at the edge of his jaw. Instinctively, his mouth fell open again, a soft sigh escaping him. He didn’t know what to expect but when another set of fingers gripped his tongue and pulled, he nearly opened his eyes out of reflex.
If someone would have told him what Eijirou would do next, he never would have believed them but the second a firm set of lips wrapped around his tongue, sucking slowly and sweetly, his brain nearly short circuited. It felt so wild, his mouth held open while someone else attempted to swallow the wet muscle, acting as if they were trying to milk it with their lips.
Eijirou slid off with a quiet pop, diving back in to run his tongue flat against the inside of Katsuki’s cheek. He groaned, low and thick, his chest vibrating against the blond’s as he licked and licked, swirling around without a care in the world. To be kissed so tenderly, his mouth taken advantage of right after it was forced full of the man’s dick, it was twisted how arousing Katsuki found it.
“God I love it when I can taste my cock on your tongue, baby boy.”
It was really unfair how dominating Eijirou was when Katsuki was asleep. It was like a different person, like a switch flipped and he became this all demanding deity that desired to be worshiped at any cost. Just the thought alone had Katsuki’s body thrumming, pulsing with so much adrenaline that he had to actively concentrate on not moving a muscle.
“I’m gunna fuck your mouth again, okay? Pump my fat load down this perfect little throat of yours.”
The bed shifted, a heavy weight settling on either side of Katsuki’s shoulders. Eijirou reached back, pulling each of his arms up to drape lifelessly around his thighs to look like he was holding on. The redhead pinched his nose again, humming happily when his jaw fell open so he could slap the head of his dick softly against his tongue.
As he pushed in, Eijirou groaned, his hips twitching and accidentally forcing a majority of his length inside. It’s not that Katsuki gagged but he did make a small wretch in surprise, the redhead freezing as his breath audibly hitched. Neither moved, time standing still for over a minute, Eijirou’s cock still fully encased in its tight cavern. When he was finally satisfied with the fact that Katsuki wasn’t awake, he pulled back until his tip caught on the blond’s lips before sinking all the way back to the hilt.
He took his time, working his shaft slow and steady, a methodical rhythm of delicate thrusts and experimental circles as he forced Katuski‘s jaw open impossibly wide. Beneath his lids, Katsuki’s eyes were rolling into the back of his head, his brain a puddle of mush in his skull, sloshing back and forth with each and every drag of that fat cock.
“Fucking hell, Kats. If you’re this good at sucking dick when you’re asleep, I can only imagine how good you are when you’re awake.”
Eijirou picked up his pace, leaning forward to put his hands on the wall, his hips having a mind of their own as they stuttered slightly. From everything Katsuki had learned about Eijirou in the times he’d been awake, he knew that the first stutter meant that he was close, often holding a steady pace before making a couple knee jerk moves before pulling out to blow his load. But from what the redhead said, he was planning on cumming inside, hiding any evidence of him being there except Katsuki’s sore jaw.
“You look so perfect with your lips wrapped around my dick. Such a beautiful baby boy for daddy.”
Katsuki felt a hand thread into his hair, fingers wrapping a fist full of blond spikes to use as leverage as the pace increased yet again. As Eijirou sped up, his motions got smaller, only moving an inch or two in either direction. It was so overwhelming for Katsuki, lying there with his throat rubbed raw, the tantalizing brush of Ei’s pubes ticking his nose as his hefty balls slapped his chin.
“Holy shit! Ahh, so fucking good. I’m gunna cum. Fuuuuuuuck yeah. Take my load. Swallow all of it like a good little boy.”
Eijirou’s thigh quivered, his nails digging into Katsuki’s scalp as he bucked forward several times before stilling. He groaned, deep and raspy as he came, his cock sank all the way to the base in the blond’s mouth. Katsuki could feel it pulsing, an intense heat flooding his chest as a steady stream of cum pumped down his windpipe. If he wasn’t pretending to be asleep, he’d be tugging away at his own length, his body aching with desire for his own release.
It was over a minute before Eijirou’s breathing evened out as he pulled back, gasping when his cock slipped free from the warm cavern. Like always, he rocked back and forth, teasing his oversensitivity like a delicate thread that might snap at any moment. Katsuki tried his best to not pant, air flooding his lungs for the first time in nearly ten minutes.
“God damn, Katsuki. That was fucking amazing… You look so pretty, I think we should take a picture. How does that sound, baby?”
Eijirou shifted, rocking back to grab his phone before scooting up slightly to sit on the blond’s upper chest. With the room as dark as it was, Katsuki knew there was no way he would get a proper image unless he used the flash, which ran the risk of “waking him up”. His thoughts raced back and forth, not minding the thought of having a picture taken but it made him wonder how many the redhead already had stashed away.
Suddenly, an idea sparked in Katsuki’s brain, a perfect plan to finally show Eijirou that he was actually awake. The redhead lined up, pinching Katsuki’s nose and sliding his cock back inside. He shivered slightly, pumping a few times before pushing all the way in with a growl that vibrated from deep in his gut. It was far too sexy for his own good and Katsuki was nearly drunk on the sound alone.
“That’s my good boy, stay just like that so daddy can get a nice picture.”
Katsuki waited, holding his breath as he heard the familiar sound of the redhead’s phone unlocking. Eijirou adjusted slightly, allowing an inch or so of his cock to show before the blond saw the warning flash the camera gave right before taking the picture. Before he could think better of it, Katsuki opened his eyes, staring directly into the flash as it caused his vision to white out with little dots.
“So good for me baby, let’s take a look and see how beautiful you are.”
The next five seconds were the longest five seconds of Katsuki’s life, his mouth still stuffed to the brim with Eijirou’s cock. Finally there was a gasp, a slew of curse words mumbled under rushed breath as the redhead fumbled with his phone before the flash light flickered on. The two sat there, Katsuki blinded, simply blinking up into bright white as Eijirou’s ragged breath echoed through the room.
Katsuki reached up, running his hands over the redhead’s hip flexors as he pumped his head a few times on the man’s length. With a quick, firm grip to his waist, Katsuki tugged backwards, forcing Eijirou to fall backwards to the end of the bed. He flipped on his lamp, whipping around to stare at the bewildered expression that graced the redhead’s face.
“K-Katsuki…”
“Mornin’ asshole.” Katsuki sneered, clearing his throat a few times at the horse feeling.
“W-When did you-how did-have you-”
“Been awake the whole time.” He paused. “Daddy.”
“Oh my gooooodddd…..”
Eijirou groaned, hiding his face in his hands as a blush that rivaled his hair crept across his cheeks and ears. Katsuki couldn’t help but laugh, a full blown belly laugh that caused him to fall over, his feet kicking wildly. Tears pricked at the corners of his eyes, his jaw aching more from smiling rather than sucking a cock for so long.
“Katsuki, I’m so sorry… I can explain.”
“Oh yeah? I’d love to hear your excuse for fucking the hell out of my face while I’m sleeping.”
“Well I just-I mean..” There was a long pause before the redhead sighed. “Ahh shit… I got nothing.”
“You got nothing? Seriously?”
“I don’t know!”
“Bullshit. Just tell me the truth.”
“I-I can’t…”
“Tell me.”
“Katsuki…”
“God damnit, just spit it out you piece of shit!”
“FINE! I’m in love with you!! There, ya happy!?”
Eijirou’s chest heaved, his adrenaline going from zero to one hundred in the blink of an eye. His hand snapped over his mouth with an audible clap as he mumbled something into his palm, a flood of embarrassment ghosting his face. Katsuki smirked at him, rising to crawl along the length of the bed and closing the bigger man in against the mattress.
“That wasn’t so hard now, was it?” Katsuki sneered, leaning down to plant a gentle kiss on the redhead’s cheek. “Glad to hear you say that when I’m awake. Well, now that you know I’m awake.”
“Huh? H-Have you been awake… The other times I-I…”
“Yeah, a good handful of times. You’re right, your cock does fit perfectly in my ass.”
“Ooooh.. My fucking god…”
It was hilarious to Katsuki to watch a man as massive and husky as Eijirou curl in on himself like a baby, a blushing mess of nerves as he nearly cried his eyes out. The blond pried his hands away, pinning them to bed above his head with a wicked grin on his face. It took everything in him to not burst out laughing again but he was sure if he did that, Eijirou might actually break down.
“W-Why didn’t you say something? Why would you let me just do that…”
“-'Cause I liked hearing ‘daddy’ talk dirty to his ‘baby boy’.” Katsuki cooed. “And I actually think it’s pretty hot when you get into dom mode, you just using me like a fuck toy for your pleasure and the idea that I had no idea it was going on.”
“R-Really?”
“Hell yeah. Plus I also really loved listening to you tell me all about how much you love me and all the cute ass dates you wanna take me on. You go from dom daddy to a fucking sap the second you orgasm. Shit’s cute as fuck.”
“Jesus, Katsuki.” Eijirou laughed. Man it was good to see him actually smile again. “S-So you’re not mad?”
“I’m only mad that I didn’t find out until recently. We could have been dating for the last couple years if you would have just said something. Well, or noticed all the times I was hitting on you. You’re really fucking clueless sometimes.”
“You were hitting on me!?”
“Oh my god, hair for brains. Have you seen yourself? You’re a god damn beast with a personality so bright, it’ll blind you if you stare at it too long.”
“Oh…”
“Now, my throat is sore as fuck thanks to someones monstrous cock being shoved down my it for half an hour so you’re gunna go get me some water and a popsicle. Put some underwear on too and get the fuck back in my bed to cuddle. Got it?”
“W-What!?”
“I’m not gunna let my boyfriend get away with slacking on the after care just because he knows I’m awake.”
“B-BOYFRIEND!?”
“Yeah, numb nuts. As of right now, you’re mine and I’m yours because I’m in love with you too, Eijirou.”
Katsuki leaned down, releasing one of the man’s wrists to card his fingers through red strands as their lips connected in their first real kiss. Though Katsuki knew what Eijirou’s lips felt like from before, nothing could compare to the feeling of being able to actually kiss back. It was gentle, soft and easy like they’d done it a million times but sparking and electric in exactly how new it was for both of them.
“Now, if you get me anything other than the orange popsicle, I’ll start locking my door at night so you can’t come in.”
“O-Okay!”
Eijirou was gone in a flash, bolting from the room and stumbling over something in the hall, cascading to the floor with a heavy thud that shook the entire apartment. Katsuki laughed, fixing the blankets before removing his jock strap in lieu of being more comfy in regular underwear. When the redhead returned, he downed the bottle of water and hunkered in against the wall to enjoy his popsicle. Eijirou seemed hesitant but after a few seconds, he slid into the open side of the bed a little awkwardly albeit happily.
“S-So how long have you known?” The redhead whispered shyly.
“About four or five weeks, been awake maybe a dozen times.”
“Man… And here I was thinking I was slick.”
“Hey, you were for years, man. You just snuck in before I was fully asleep one night and ate my ass like you were a lost man starved. Which you will be doing on a regular basis by the way.”
“God, I’m such an idiot.”
“Oh I already know, good thing I think it’s sexy as fuck.”
Katsuki finished his popsicle and threw the stick across the room. He leaned over the husky man, flicking off the side lamp before shimmying down under the covers with a hearty sigh. Eijirou sat stiff next to him, seemingly shell shocked as to what to do with himself now that his secret was out of the bag. Katsuki took it upon himself to snuggle in, his head rested on a firm pec with his legs intertwining lazily with the thicker, much longer pair.
“So you really like me?” Eijirou mumbled, hugging him with a gentle squeeze.
“No.” Katsuki answered curtly. “I fucking love you. Now get some sleep, we can talk about it all in the morning.”
Eijirou chuckled, placing several kisses to the top of his head before finally relaxing a little bit. It felt so warm, so carefree and simple. Just two idiots who loved each other and came together in the most off the wall, round about way possible. Katsuki knew they’d have to come up with a cover story for how they got together but that was the least of their worries. All that mattered was the fact that the air was clear between them and everything from then on out would be them facing it all together.
“Oh and Ei.” Katsuki said, a stray thought popping into his head.
“-’Sup, Kats?”
“Tomorrow, you’re showing me all of the pictures you’ve taken of me over the years. Don’t you dare try to delete any of them or I’ll blast your dumb ass into next year.”
“Does that mean you’ll want to see the videos too?”
“.....You took videos…..”
“Uhh.. No?”
“Eijirou Kirishima, you’re a fucking whore.”
“I’m sorry?”
“Don’t apologize, I fucking love it. And I love you, ya big oaf.”
“I love you too, Katsuki.”