Chapter Text
This was the third time in two regards: the third time of Mob sitting pants down on the office couch, briefs and all, and the third time today he fumbled putting on the condom.
He was bad at pretending to be clumsy. He'd learned lying well enough from his master, but not the intricacies of a more difficult play-pretend, not the ones that required him to do more than nod along with whatever new nonsense his master was making up.
And Reigen thought, Mob probably knew that, too. How obvious it was, that he was dropping them on purpose.
Reigen had known at the first try and by now he wondered how many Mob would drop before giving up, one way or another.
Would he find new excuses? Would he just keep going, waiting for Reigen to make any move? Would he ask him to, if Reigen didn't? Would he eventually just put it on like he was supposed to, accepting that Reigen would not touch him?
Reigen knew he should keep going to find out. Ideally it would end up the latter and they would call it a success, he taught him well once again they'd say and Mob could pull his pants back up. After filling up that condom, of course, couldn't expect the boy to suffer through his boner until it went down by itself.
But maybe Mob was just as aware as Reigen how badly he wanted to touch him, as well.
"Tsk, Mob, if you keep dropping them you'll have to buy your own!" Reigen chastised while leaning down once more to pick the condom off of the floor and despite the fact that his heart pounded with a little more anticipation each time he dropped one.
"Sorry Shishou." The reply was stale and he was silent for a moment while Reigen stood up to throw the condom in the trash. "Maybe you can show it on yourself…"
Reigen briefly stilled at that. That was something different than expected.
By now Reigen had watched Mob masturbate twice and been aching throughout both of these times, while his own pants had stayed up and zipped.
He should tell him that he could show it on some object. That's what they did in school, didn't they?
His gaze landed briefly on the little haniwa figure decoration that stood next to the TV, the only vaguely phallic object in the office. And it had little arms that were in the way of education.
Well, too bad.
"I mean, since you're hard anyway I thought…" said Mob at that point, probably since he'd noticed Reigen's searching eyes and his master took offense, scoffing at him for what a damn brat he could be.
"Fine." So he went behind his desk to get a condom in his own size from the back of a drawer, educating Mob about condom storage in the meantime, that he should never carry them around in a back pocket or his wallet, unsure of how well Mob listened or if he even needed to. He probably already knew that. Just like he knew how to put on a condom.
Reigen saw his dick twitch as he was back next to him, unbuckling his belt.
"It's normal to get aroused while watching sexual behavior, by the way," he said while pushing down his pants, keeping the boxer briefs on as he sat down on the towel that they had spread on the couch cushions in advance. The faux leather of the new ones was easy to wipe, but uncomfortable for naked skin. "Regardless of if you're very interested or not."
Briefly Mob looked up, but he didn't comment on Reigen's interest-or-not. He just nodded belatedly, then his eyes went back down to the shape within the dark fabric, stretching against it.
Reigen let him look a moment longer before he revealed himself, pushing his underwear down just enough to let his erection spring out.
Mob was hyper-focused. What an eager to learn student he had…
So Master told him some more things of what Mob already knew while he stroked himself to full hardness — also part of his verbal teachings, no trying condoms on half-boners — and pulled his foreskin back, just like he had instructed Mob to earlier.
He went through all matters of instruction again as he carefully tore the little pack open and placed the circle, pinched at the tip, on the head of his dick, holding the base of it with his other hand.
"And then just roll it all the way down. See?"
Mob swallowed as he squirmed his thighs against each other, his stiff little cock swaying to the side. "Yeah."
Honestly, it wasn't even that little anymore… Significantly smaller than Reigen's adult size, sure, and the color of his glans was just coming through, but he really was growing up.
"Your turn, Mob," Reigen reminded a little delayed now, reaching for another condom from the box on the table.
Mob ripped it open so carelessly that it fell before he could even pretend trying to put it on.
"Ah, sorry, I'm nervous," he excused himself while Reigen was already scolding him in an annoyed tone that was just as fake as Mob's incompetence, fishing for the fifth of the ten-pack.
Reigen bit back a comment about where such nervousness had been last week, when he'd been on this couch with spread legs and his own fingers up his ass, innocently asking how he knew if he found the right spot.
"You'll know," Reigen had simply said, while he tried to not look and not listen too closely to his little gasps and the slick sounds the lube he bought by his request ("I wanted to try- uhm- I wanted to try some things, but I can't buy … lube … so I thought, maybe you could help me out, Shishou.") made.
It had been blatantly obvious that Mob wanted his hands-on assistance in finding it by that time already and for how insincere all of what they did here was, it seemed the one truth had been that Mob really couldn't stimulate his prostate well with just his own stubby fingers. Reigen had been busy trying to cope with what was happening though, with the fact how shameless and direct Mob's advances had suddenly turned, with the fact that he had really let it happen after all this time of repression. The second time watching his underage student masturbate was two times two much already anyway, but even more so it was way too early to consider touching him, let alone putting something up his ass.
Mob had seemed both a little ashamed and a little frustrated afterwards and Reigen had ordered him ramen with extra chashu that evening, as if a little bonus treat could do anything to ease his conscience.
But despite the persistent feeling of guilt, here he was, telling him "You'll never get it done like that!" as he opened the new square package with a shake of his head.
"Will you—"
"Yeah yeah, hold at the base," he interrupted before Mob could finish whatever question he was about to utter and the boy scrambled to sit up a little better and grab his dick.
And once more Reigen went through the basic instructions as he placed the condom gently on top of his glans, but this time there was no doubt that Mob wasn't listening anyway.
He inhaled lightly, lips open, as Reigen's fingers slid the slightest bit down, rolling the thin film over the head of his cock. Intricately aware this must be the first time someone else touched his erection, even if it wasn't skin-to-skin. Even if Reigen only used two fingers to roll it all the way down his length and yet, it made Mob's cock twitch.
Reigen himself had gone silent at this point, trailed off somewhere, sentence left incomplete while neither of them paid attention.
"Th-there," Reigen remembered saying then, after awkwardly holding Mob's cock between thumb and pointer finger for a moment, before finally letting go.
There was a quick glance from both of them, meeting in the middle and it was enough to know they both wanted Reigen's hand to keep going and "I'll make sure it sits right," Reigen said and in the next second, when he stroked his closed fist down Mob's length abruptly, he heard Mob let out a full moan for the first time in his presence. The touch was brief, firm, quick. "There you go!" One-and-done before the hint of responsibility he had left in him tugged him away — and Mob's hand tugged at his wrist, while his hips involuntarily bucked into nothing, with Reigen's hand gone just as suddenly as he had touched him.
He did not tug him back, Mob just held onto his arm as his other hand tried to soothe the loss before he could think, his broad little fingers feverishly rubbing at himself.
And Reigen stayed leaned towards him just slightly, saying nothing as he watched him and listened to the noises he made and touching himself was only the thing he wanted third-most. The second was turning his head to kiss and praise him while he got himself off. The first was to keep touching him himself.
What he settled for was thinking about how Mob's cock had felt in his hand for this brief moment, to ingrain it into his memory, the size, how warm he'd been, his shape, alongside those sounds he made now, and his smell.
And how he held onto his forearm made all of this much more intimate than it had felt the first time. Certainly Reigen's ow silence and the much more fervent noises Mob made now were contributing too.
It wasn't merely the inappropriate overstepping of boundaries when he clung to him like this, suddenly it was something even more debauched — but also more close, beyond he physical proximity.
Enough to scare Reigen away, but when he tried to gently pull back, Mob only let go briefly to then cling to his upper arm with more intent, hugging it closer, fingers clawing into the fabric of Reigen's dress shirt as he pressed a burning cheek to it. That would have to be ironed.
"Mob…" Reigen said, unsure how or if to tell him to take it a step back, but he didn't get to it anyway.
"Shishou…" Mob keened back as he came, legs and hips twitching and Reigen watched intently how he touched himself in those last few moments. How he stroked himself a few more times as the tip of the condom filled up, how his hand moved to the base of his erection and his fingers reached down to his balls as he gently squeezed himself.
Very abruptly he let go of Reigen and himself as well as he let himself fall back, sink into the couch, catch his breath while his cock slowly went limp.
Reigen sat up and cleared his throat, going back to their farce of education: "Careful, or it will slide off."
Mob looked exhausted but he reached down obediently, removing the condom under more of Reigen's instructions, which ended with tying a knot into it. And this was the first time today Mob almost dropped the condom accidentally without just pretending — only to catch it with his powers by sheer reflex.
There was a moment were he clearly worried that Reigen had noticed.
Then there was the moment in which he met Reigen's eyes, who was looking straight at him, a deadpan quality to it and Mob realized that yeah, he had definitely noticed.
It took just another moment until the shame that settled in despite the fact that it had all been obvious from the start became abundantly visible in the redness of his ears and face, while he let the filled condom float into the trash bin.
"Uhm, thank you for your help, Shishou. I think I will know how to put one on now."
There was a light huff in return, something between amused and fond about his now meek demeanor after being so cheeky.
"Well, don't mention it Mob!" Especially not outside this office… But even might it be foolish, he wasn't really worried about that.
"I'm just wondering if the amount is normal…"
"Huh?"
Well it wasn't really unexpected that he'd play this out for a little longer, while Reigen was still hard. In fact, he had been half waiting for it, otherwise he could've already pulled the condom off his own painfully hard cock. He was just unsure where he was going with that.
"My … ejaculate" — he said that word in a notably smaller voice — "Is yours more?"
"Ahh, well," Reigen made, sounding like he was deeply invested in the intricacies of this imaginary problem, just like when he strung some customers along. He was much more trained in this regard. "That depends, Mob. That really depends. Nothing you need to worry about either way, though."
"Depends on what?" Mob wondered, daring to look up again now and he reached for his briefs and pants sitting around his ankles, to pull them up. "Can you show me?"
And there Reigen's permission to touch himself was.
"Hmm, I don't know Mob…" he said nonetheless, just to not drop their game that suddenly. "I don't know if that's necessary." Necessary. What a presuming word to use at this point.
"Wouldn't it be wasteful now that you already used the condom?"
How ironic… Did he say that on purpose or was he really that oblivious? Maybe it was Reigen's fault for making him try to find a good reason to continue, when there absolutely was none.
"And … I think it would put me at ease, Shishou."
"Is that so…?" Reigen mused, not even looking at Mob as he gave his cock a first slow stroke that already felt heavenly after such a long period of neglect.
Next to him Mob silently shuffled into his briefs and then either didn't dare to follow up with his pants or was too focused on watching Reigen, but he kept them at his knees.
It made Reigen chuckle briefly, which his student didn't seem to mind either, while he soon picked up the pace of his hand.
"I can't- ah- have you all tense and worried, after all. Not- hng- good for work output, you know?"
"Of course, Shishou."
Of course… He was his student, after all.
Reigen thought of the feeling of Mob's erection in his hand while he stroked his own, earlier jerk-off material than he had anticipated. He leaned back, head tilting towards the ceiling at the top of the backrest but his eyes looked to the side, watching Mob watch him.
He gave himself a firmer stroke, silently groaning, slower ones, before he tightened his hand again and Mob shuffled ever so slightly in his seat while he groaned a little louder, the way he moved his thighs suggesting that he was already getting hard again himself. Teens had such short refractory periods, but seeing as it was getting late, he'd likely end up having to care for that one himself…
"See, Mob. I told you it was natural." Reigen lifted his head back up just to see him blush at that — or maybe at the noises his master made.
And his fingers twitched, too. It was so easy to gauge why, the way they subtly flinched in a magnetic direction just the same way as his eyes stuck to his cock like drawn by unseen forces and Reigen's heart beat a little faster with the unreal realization that Mob was not just getting himself off on this, he was interested in pleasing him as well.
Something that wasn't a surprise in theory with how he had behaved around him the past months, but still nauseatingly arousing to see the involuntary proof for. Reigen was not used to attention in these areas, especially not in the few cases where there was interest from his own side.
Mob lacked the brashness to actually touch his master's cock unprompted however and Reigen felt it was way too early to lead his hand and make him do it, so Mob kept simply staring, mouth slightly agape. And Reigen basked in it as he drew out each squeeze and stroke and twist of his hand, ignoring how wrong it surely was to put on a show for his underage employee. But Mob was so much more than that to him.
"Hmm, are you learning something?" Reigen teased for his staring and Mob's eyes just briefly flicked up to meet Reigen's before the pull had him back, his cheeks bright red, eyes lidded — but staring still.
"I think I do," he said and he said it with such confidence, the teasing either going right above his head or willfully ignored, that it made Reigen's breath hitch just a little. Maybe on the praise he wanted to give so badly. "Shishou really does it much more slowly."
Yeah, just like he had kept telling him the first time — "Slow down, Mob, slow down. You're not on a deadline, no wonder you're feeling overwhelmed like that." — but Mob hadn't managed well.
He was so used to making it quick. A family home wasn't very private. "So I wondered if I could try some things here in the office instead."
"Only for a while," he said and for a moment he let his hand rest on his pelvis, letting his erection stand on its own as he felt precum dripping inside of the condom. He hadn't worn one for so long. Probably this one was expired, but Mob didn't need to know and it wasn't like that mattered anyway. "When I get closer, I do it quicker."
With the first new stroke he tilted his cock towards Mob, just to startle him — successfully — and as Mob gasped lightly about it he imagined how it would be to cum like this, no condom, spilling into Mob's lap where his thighs were still bare. If he'd cum really hard would he be able to hit that little open mouth?
"Fuck…" It slipped out in synchronicity with the image of Mob's lips with his cum on them slipping in and that was when he picked his pace back up again. Not as mindlessly as Mob, his strokes were quick and precise, purposeful, intentional.
Reigen's breathing became heavier in the otherwise silent room and so did Mob's, interrupted by occasional groans, then the wetting of his dry lips.
And when Mob, strange as he was, leaned just the slightest bit against his as he observed "then you're close now," Reigen moaned a breathy "yes" and spilled into the condom right the next moment.
He moaned wordlessly for a few more strokes and Mob leaned a little closer instead of taking his distance, seemingly serious about his curiosity in some regards — he intently examined the now filled condom tip with his eyes, so Reigen made quick work of pulling the condom off even while his body was still recovering and pushed his cock back into his underwear right away, too.
"Well, what do you think?" He wondered, exhausted yet not forgetting the pretense, as he held the now tied condom in front of Mob who looked wildly flustered about it — something Reigen couldn't really get behind, after he hadn't looked half as bothered while watching him jerk off.
"Ah, it- it's a little hard to tell … inside the condom. And because I've already thrown away mine…" Reigen replied with a hum, apparently thoughtful. "It does look like a bit more, though…"
When Mob reached out a hand tentatively to touch it, or maybe not — he didn't seem so sure yet — Reigen pulled away and stood up to get his pants back on. His interest was curious, and … it wasn't like touching a condom filled with his sperm was worse than anything they'd spend the last hour with, but…
"Ah, well, next time it might be the other way around. That fluctuates, you know."
He took some quick steps to throw it in the bin where Mob's had landed before and tied the trash bag right away, too. He couldn't leave that in the office, after all.
"Next time…" Mob repeated in silent thought. Then he sprung up and pulled his own pants back on. "Maybe next time we can try comparing again, Shishou."
Reigen couldn't get behind the heat in his own neck now, while he was washing his hands, dampening it with a bit of cool water.
A next time on the horizon wasn't exactly unexpected either, but speaking it like that seemed shameless…
It was a weird disparity, to be acutely aware how wrong this was every step of the way, how urgently he should shut this down, should have shut this down at the very beginning, yet being unable to feel any of it. Quite the contrary, he felt calm. Relaxed. Comfortable. Happy, honestly.
And when he glanced at Mob while drying his hands, who was arranging his half-erection in his slacks to hide it better, yet still carried a small smile on his healthily flushed face, he seemed to mirror the same.
"I mean, we're only making exceptions," Reigen replied, giving a brief gentle pet to Mob's head in passing as he made room for him at the sink. "You can't go growing up not knowing these kinds of things, after all, that'd be negligent, right?"
Mob gave a small nod as he watched Reigen put his suit jacket on and fetch his wallet while Mob straightened his own clothes and grabbed his bag. He looked just slightly dejected now.
"But if it's something important, like—"
"—then you know you can always count on me, Mob." Reigen unlocked the office door, pulling it open with a little flourish and a nod towards outside. "What do you say, hungry?"
Another nod. "Thank you, Shishou."