"What do you mean, you don't know how to use a condom?"

Nagisa wrinkles his nose. "You promised you wouldn't laugh-"

Karma responds by holding up a single finger. "I never said such a thing. But, you're twenty three."

"So?" Nagisa tries. "I was… busy…"

"Have you even kissed anyone since the Kayano thing?"

"…"

"Wow," it roles surprisingly drying from his tongue.

And then Nagisa thinks of an excellent point. "Don't act so surprised. It's not like we ever talk about this kind of stuff."

Karma takes a swig from his Asahi Dry, which makes an audible clatter as he slams it down on top of the kotatsu. "So let me get this straight; you have to teach sex ed to a bunch of hormonal teenagers, when you, in fact, have no experience in that field. Yeah, you seem pretty screwed to me."

"Thanks," Nagisa mutters, pushing his own can in front of him. He'd be tempted to drink more, given the circumstances, but at the solid age of twenty three he's learnt his limits. He knows that it only takes one gulp too much for their weekly meet up to end up with Nagisa passed out, and with Karma practically carrying him to the closest metro station to throw him onto the last train home.

"What'cha gonna do about it?"

Nagisa sighs. "My current plan was to find a good YouTube tutorial."

Perhaps it's the alcohol, but Karma actually starts letting out an unsettling mixture of a snort and a giggle. "Next thing I know, you'll say you've never even seen a condom."

"…"

"For real?" He takes another swig. "Wait there."

He blinks, when Karma just stands up and leaves him there. Karma has a very important job, as he likes to remind Nagisa with his constant whining about his co-workers. Such a job requires living right in Tokyo, lest he deal with a two hour commute either way. He makes an almost hilarious salary compared with Nagisa, but even on that, his apartment isn't particularly big. Though, the fact that he has a whole separate room for his bed makes Nagisa slightly jealous, and is largely why their meetings take place here, rather than at Nagisa's place. Back in university, it used to be whatever random izakaya took their fancy, but admittedly Nagisa preferred it with just the two of them.

"Catch," Karma calls, when he emerges from his bedroom, and goes into an overarm throw.

Like instinct, Nagisa does. Years of friendship with Sugino have given Nagisa pretty good hand eye coordination when it comes to objects being hurtled towards his face. But, said object was a lot smaller than a baseball. Nagisa peered between his fingers at the small square object, realising after a moment that it was indeed a condom. Like a hot potato, he dropped it, and it landed right in the centre of the kotatsu.

"Oh come on," he says, "it won't kill you."

Nagisa forces himself to take a moment. Because Karma's right, and if he absolutely has to demonstrate the act of condom use in front of an audience, it would be very helpful if he was able to actually hold one first. Though, fortunately enough for him, none of his students were as devious and sadistic as Karma.

"What do you expect me to do with it?"

Karma raises his eyebrows. "What, you want me to get a cucumber or something? I don't just have one lying around in the fridge."

Admittedly, he splutters.

"Okay, cherry boy, I get it."

Unfortunately for him, Nagisa ends up living up to the name, flushing wildly. It's not that he has a particular aversion to sex, he's just never seen the appeal of meaningless hook-ups. He's heard plenty from Nakamura already, all about her foreign escapades, and that's almost enough for a life time. And, well, Nagisa hasn't ever really been interested in dating anyone either. It was all about studying through high school and university, his eyes set firmly ahead of him, and now his biggest concern is grading his student's papers.

He senses the conversation's becoming derailed, though. "The school board provides the demonstration condoms."

Something comes over Karma's face, and Nagisa knows it's not good. "Vagina."

He squints. What, is he trying to embarrass him or something? "I'm not a child-"

"Cum," he says, "rim job, butt sex."

"Karma-"

"Autoerotic asphyxiation-"

"What?"

Karma shrugs innocently. "It's important to touch all bases, right?"

"That had better not be some sort of metaphor."

He laughs it off. "Do you want me to show you or not?"

"You're going to teach me?"

"Yes?" He tilts his head. "That's what you asked, wasn't it?"

No, it wasn't what Nagisa asked at all. He didn't want Karma to give him the sex ed demonstration, not in the slightest. He was more… venting. Is this a genuine offer? It's hard to tell, when it comes to Karma. Sometimes he's just waiting to humiliate you, others… Well, there are other times, Nagisa swears… And then he starts to wonder if he should actually take him up on the offer.

"Like, be my sex teacher?"

Something in Karma's eyes shines. "So I get to be Sensei this time, huh?"

"I studied for five years for that title," Nagisa deadpans.

"And maybe I studied five years in the bedroom-"

His face heats up again. "I don't want to know."

Karma's apparently had enough of that, though, because he reaches for the dreaded condom, positions the packet between his teeth, and rips it open. Clearly, he's far too familiar with the action, and somehow manages to look smug whilst doing it. Nagisa just stares in horror, as the slippery thing is removed from its casing.

"You know the basics at least, right?"

Well, yes, he wasn't stupid. "Y-yeah."

"Hmm," he thinks aloud, "there's nothing to roll it over though. Sorry, didn't think to stock up on phallic vegetables."

"I think we're using test tubes at school," Nagisa mutters.

Karma leans back with one hand. "You might be surprised but I don't have any of those either."

"I don't think they compare to the real thing anyway," Nagisa says, pretty sure his own penis doesn't resemble a test tube much.

Okay, he's blaming the alcohol for that one. He might not be drunk, per say, but clearly it's enough to make his tongue loose. He should be thinking, before he speaks. But somehow it's already too late, because Karma's face goes slightly dark for a moment. Nagisa's not sure what kind of plot involves condoms, but-

"What, you want me to be your life model or something?"

"Are you offering?"

There he goes again. Nagisa wants to punch himself hard in the face. What possessed him to say something like that? He knows himself well enough to be able to take a step back and evaluate the things he says. And he's well aware, especially with the beer making his voice just a little lower and rougher, that a comment like that comes across at least a little flirty.

Karma bites his lip, as though he's seriously considering. "I mean, sometimes a practical demonstration is a valid teaching method…"

Nagisa holds his hands in front his crotch dramatically. "No way."

"Relax," he almost roles his eyes, "I wasn't going to touch you."

"You're…" Nagisa blinks, "going to put it on yourself?"

"If you want," Karma responds, his voice light and airy. As though this is normal Saturday.

The thing is, it's not like Nagisa's never seen Karma's… areas, before. It was inevitable, really. They were best friends. There'd been sleepovers, mutual bathroom excursions, a few onsen trips… Of course, he'd never actually looked any of those times. It's just impolite! One of the things you just understand, as a guy, is to not just go looking at others without permission. So, if Nagisa ever caught sight of Karma naked down there, he'd turn his head away like lightning. But now Karma's asking him to look directly at it… to study him there.

He swallows his worries. "Isn't this… kind of weird."

Karma hums. "I guess, only if we make it weird. Do you feel weird?"

Like the world's most extravagant game of gay chicken, Nagisa accepts his fate. "No."

He flinches, though, as Karma reaches down to his trousers, and starts to tug at the zipper. Like some kind of slow motion horror movie, he feels sweat start to gather unpleasantly on his forehead, sliding all the way down his neck. This can't be happening. Karma seems somewhat determined, though, focused on his task as his jeans are undone enough for him to just reach in and free himself.

Nagisa's breath catches in his throat, and he reminds himself that he's supposed to be looking. If Karma says it's not weird… then it's not weird. He catches sight of Karma giving him a look, as if searching for permission. And that feels weirdly intimate, making eye contact, especially considering where Karma's hand is. Nagisa's hands? Firmly clenched into fists in the centre of his lap.

But then, to worsen the horror, Karma grips himself a little tighter than he really needs to, and something sinks in Nagisa's stomach. Instead of saying anything, or actually attempting to put it on like he was supposed to, Karma's hand slides up. Like the midst of a car crash, Nagisa can only watch in morbid fascination for a moment, when it goes back down again. And then up, with a small twist added. Nagisa's not so innocent that he doesn't know exactly what this activity is, and in lieu of screaming, his arm flips out, knocking over the empty can of beer.

"What?" Karma questions, and at least for a moment his hand stops.

"D-don't do," Nagisa splutters, "that here!"

"You can't put on a condom on properly when you're soft! It'll just slide out of position. It hurts like a bitch when you get it up, believe me."

"That doesn't mean you should do that in front of me!"

Karma's eyes narrow. "Go sit in the bathroom then."

"No."

"How is it any worse than what we were already doing!?"

"P-pleasuring yourself is different!"

"Don't call it that. And it's not necessary!"

"Why don't you come over here and try it if you have a problem with how I'm doing it?" Karma snaps.

It's not unlike him, to react that way when slightly annoyed with Nagisa. What is unlike him, however, is to suggest in the process that Nagisa touch him there. His face doesn't just heat up, he's completely overloaded. How dare Karma even suggest- How is his logical conclusion to 'don't masturbate in front of me', 'come do it yourself'?

"Fine," Nagisa says, and knows he'll live to regret it.

But he's never backed down from one of Karma's challenges before. He's not about to start on a mildly drunken Saturday, during an argument about whether it's okay to masturbate in front of your friend or not. Nagisa's not sure what constitutes as 'too far', though, but touching his best friend's dick might just be it. Too late now.

Nagisa snatches the condom from his other hand, eyes burning with determination, and he looks at it. As he said, he's not stupid, he knows the theory. Or, at least, he thinks he does. It wasn't like he'd had a particularly detailed lesson before, and it was years ago. He stares down at the condom, though, finding it oddly slippery as he braces himself and begins to unroll it.

"You're already doing it wrong."

Nagisa glares. "How?"

The annoyance dies down from Karma's eyes then, just a little. "You have to pinch the tip first, and roll it down over the head, not before."

Nagisa gestures him. "I'm not sure I can from this angle-"

Just like that, the annoyance was back. "That wouldn't have been a problem if you'd just let me finish."

He grabs him at his base, cutting him off as he purposely manoeuvres his length into a more upright position. "I'm doing it."

For some reason, Karma actually has the nerve to twitch at that comment. But Nagisa's committed now. It's kind of hard, like he needs an extra hand, but he somehow manages to position the condom fairly right (or so he assumes, because Karma didn't try to correct him again), pinching the tip between his fingers as he begins to roll it over the head.

Of course, Nagisa has to look at what he's doing. Which means he also has to actually look at Karma's length in intense detail. Not that he's thought about it before, but it's a solid weight in his hand. His fingers move quickly, lest the condom somehow fall off, and he starts to unroll it. As irritating as Karma can be, he doesn't actually want to hurt him, so he elects do to it slowly. He concentrates, his fingers trailing down bit by bit until he's reached the base. Somehow, it barely registers in his brain that Karma's starting to feel firmer by the second.

"Uhm," Nagisa breathes, looking up again to looking Karma in the eyes, "is it good?"

He doesn't miss the way they're slightly glassed over. "Y-yeah. That's a pass."

"Hmm," Nagisa looks down again, and his hand moves back there. He fits it around Karma's length, and attempts to smooth the condom out. If they're doing this, then he's going to execute it perfectly. Not that there were wrinkles anyway, but he doesn't want to risk it. But then Karma audibly gasps, and Nagisa stops zoning in on the condom, coming to the realisation that Karma actually got hard.

"I-"

Karma almost dry heaves. "Nagisa, I suggest you stop touching me now."

He looks down in shame, removing his hands immediately. "Sorry, I've never… I didn't know…"

Something in his expression looks tired. "What, that you were practically jerking me off?"

"I wasn't-" Nagisa says, and means it, "I was just making sure the condom was secure."

"Well look at what you did," he gestures.

"You… liked it?"

"I'm pretty sure anybody likes it when they're jerked off-"

"I wouldn't know!" Nagisa can't believe that this is going to constitute his first sexual experience, and he didn't even really mean to do it.

Karma looks down at his erection, and back at Nagisa. "It's not like you're teaching your students about stuff like this, right?"

"No, it's a little too graphic."

"But if they ask questions…"

Nagisa swallows. "I guess… some practical experience would help. Just in case. I want them to feel comfortable asking me things, of course."

"So," Karma says, "I could ask you to leave, so I can go take care of this, and we can act like this never happened. Or…"

"It's still not weird?" Nagisa asks, no matter how pointless it is.

"Only if we say it's weird," Karma repeats, and now he really is a little breathless.

Nagisa reaches for him again, despite his better judgement. He can't let go of how deeply wrong something like this should be, and yet… Karma's a solid weight in his hand, and for some reason, it doesn't gross him out. He's frighteningly aware of what they're doing, but the fact that he's okay with it is somehow disturbing to him.

He tries to repeat his earlier movement, considering that it already got Karma into this state. His hand feels weird and awkward as he slowly slides up, and then down again. The condom is lubricated on the outside, so it's an easy glide. Nagisa hesitates about going too fast, afraid of doing thing rash lest Karma react badly.

Karma bites his lip. "You can go a little harder."

"Oh."

He looks as though he's trying really hard to gather his thoughts. "This has to be educational, right? Faster's good too."

Nagisa nods, and tries again. But, it still feels strange, like his arm isn't quite in the right position. He tries, though, even going up onto his knees so he has enough leverage to jack him properly. Nagisa really doesn't know what he's doing, though, so he can't help but feel awkward about everything he's doing, though he does attempt a little more speed.

"Just do what you'd do to yourself," Karma cuts in.

Somehow, even given the situation at hand, Nagisa manages to turn even redder than he was. Nagisa's never even really thought about it, during that kind of activity. Karma's erection feels different to his, anyway, so it's not like he can just rely on muscle memory. Usually it's just a means to an end with him, quickly finding what feels good and sticking with it until his release.

He finds it a little easier to close his eyes, and he finds his movements become a little less stiff. It's hard to know, when he doesn't have any sensation to go off. There's not a lot of variation when it comes to a handjob though, right? He's pretty sure this is what he'd do to himself, though it still feels entirely weird.

"-gisa. Nagisa."

For a moment Nagisa wonders if Karma's moaning his name or something. But then he opens his eyes, and it's clear that Karma is in no way lost in pleasure. At the very least, he seems a little frustrated. Nagisa almost deflates entirely. Even the clumsiest of impassioned teenagers can manage something like this, yet somehow he's so terrible at it.

"Okay," he says, and then his hand covers Nagisa's, pretty much moving it for him.

Nagisa remembers what he's supposed to be doing, here, and he pays attention. Karma's putting pressure on his hand and moving in a more purposeful way. Like he's really trying to tug at himself rather than the vague feeling up. Honestly, as he thinks about it, this is the first time he's ever seen someone else like this, and he's mildly fascinated.

At least Karma seems to be enjoying it more. When Nagisa looks up at his face, his lips are slightly parted, and his eyes are low. He's not sure how to feel, about seeing Karma in this way. It's like something forbidden, your best friend in the midst of pleasure, and it sends a strange fire through his veins. As though Nagisa wants to see more.

Weirdly determined now, Nagisa knocks Karma's controlling hand away. He gives him a look of confusion, before Nagisa resumes the action. It's a little strange with the condom in the way, but Nagisa can still feel the shape of him pretty well, his ridges and veins, and the way he's started to pule lightly in his grip.

He leans forward again, and really takes it in as he applies more pressure still. He starts to think that he's getting it, because Karma's breaths certainly get a little heavier, and he hasn't made any further complaints. Once he thinks he's got the hang of it, he experiments a little, varying where he applies the pressure. He strokes him from base to tip, before twisting his wrist just a little.

"Y-yeah," he finally says, "like that."

Nagisa doesn't understand why there's fire in his own crotch, and why his trousers are painfully tight. This is supposed to be purely educational, yet Karma's doing something to him. Nagisa almost starts panting too, though he can at least just blame it on the exertion. He speeds up, then, trying to figure out what Karma likes, and what'll get him the reaction.

"H-how am I doing?" He asks, when Karma doesn't say anything else for a while.

Karma opens an eye. "Just fine."

His voice is a little strained, though. Nagisa takes it as a good sign, going with the twisty movements as his speed picks up. He has absolutely no idea why, but he wants to get to that end peak, to see just what will happen. He likes the way a bead of sweat rolls tantalising down Karma's neck, and the way one of his hands is curled around the kotatsu, gripping onto it.

Finally, Karma let's out a noise that's kind of like a grunt, his erection twitches, and the condom starts to fill. Nagisa can't help but watch in an almost morbid fascination, his hand moving almost idly. Then he looks back up at Karma's face, where his lips are still parted, but he looks good, relaxed. At the very least like he somewhat enjoyed it.

"Stop," he instructs when he's too sensitive, and Nagisa immediately lets go.

For a long moment, they just sit there in silence. Karma coughs once, twice, before pulling the condom off and trying it so nothing can escape, which Nagisa watches closely because he's supposed to be learning, and tosses it vaguely across the room, somehow directing it perfectly into the bin. Nagisa almost compliments him on his aim, but he doesn't because that would be weird.

"Okay," Karma says eventually, like he's made a decision. "Your trousers look uncomfortable."

"Oh," Nagisa tries to squeeze his legs together to hide it, but really that just creates pressure which accidentally gives him a jolt of pleasure.

Karma stares at him. "How about I return the favour?"

"What?!"

"It's polite."

Nagisa has never considered the likelihood of this situation. In all his life, he never thought he'd be right here, with Karma offering to give him a handjob. Well, maybe in his deep dark teenage fantasies- but that was years ago, and entirely the result of overwhelming hormones that had littered his junior high years. So yeah, maybe there had been a wet dream or two, but there was a huge difference between that and what's happening right now. He doesn't even know how to react.

"I-I-"

Then Karma shrugs. "You can't learn without knowing how it feels, right?"

"Okay?"

He regrets it almost instantly, because Karma wastes no time. Within no more than five seconds, Karma's hand is down his trousers, which usually fit loose but right then are tight around where he's hard. It's not possible to think, when suddenly he grips him, and pulls him out with purpose. All Nagisa can do is let out a high gasp as though he's suddenly electrocuted.

"Fffff," is what escapes his mouth.

Karma's nonchalant about it, jerking him as if it's nothing. Nagisa doesn't even know what to do, what to say… how to even react as he's taken along for it. All he knows is it feels nothing like his own hand, and considering that's all he has to go off, he's incredibly overwhelmed. He thought he at least understood sexual pleasure but…

He can't stop his hips from moving in time with Karma's hand, though at the very least his eyes squeezed shut of their own accord, so it's easy enough to turn the rest of his senses off. He knows he tosses his head back as strange whimpers are stolen from his lips, as Karma's hand speeds up. Where Nagisa fumbled, Karma seems to know exactly what he's doing, and partly it reads like a calculated attack.

"Ka-Karu-"

Nagisa doesn't get to finish his sentence. Honestly, he doesn't know why he even started. His insides have been turned white hot, and he can feel it burning there in his groin. It's almost on the edge of too much, and for once in his life he starts to get it. He'd always found it strange, the way sex seemed to be such an important factor in so many people's lives. It wasn't that Nagisa had ever been opposed to it, more that he was the type to avert his eyes if he was ever so unfortunate to find himself in one of the sketchier parts of Tokyo (he was never forgiving Nakamura for that time she made him miss the last train in Kabukicho, seriously). But this feels good, and even though it's not even over yet Nagisa knows he wants more. He's also confused, though, his rational thoughts seeming to clash with his most base ones. Like it's all muddled up there in his head, all at once.

"S'okay, Nagisa," Karma manages to sound reassuring, "you can let go."

As if by magic, Nagisa's eyes roll up and he does. For a moment, his entire body's on fire, and the world is shaking. But then he comes back down, just a little, and it's like the last eight months of tension have left him, and all he's left with is a faint ringing in his ears. Yeah, Nagisa definitely gets it. It's never felt that satisfying before.

He opens his eyes, then, and takes in Karma's expression. For just a moment, they manage to lock eyes, before Karma looks down at the palm of his hand, a movement which Nagisa follows. To his own mild horror, he sees semen and lots of it, all over them, like some kind of weird glove. Somehow, that's the part he manages to feel the most embarrassment over. Surely it wasn't usually… that much.

When Nagisa doesn't say anything, Karma gets himself to his feet with a ceremonial kind of grace, and leaves without a word. For a moment, Nagisa wonders if it was that awful that he's just going to leave him here like this, but then he remembers that they're technically in Karma's house. He can't just leave. And, just like that, a couple of minutes later he pops out from the bathroom, hands entirely cleaned off.

"Uh, Nagisa-"

"Look at the time!" He jumps up for affect, but then actually looks at his phone screen. "I don't want to miss the last train!"

"Right," Karma nods seriously, "you'll be stuck here."

They don't live in Kunugigaoka anymore. Karma's job (and thus, higher salary) allows him to live far closer to the centre of Tokyo. It's convenient enough for him, but it means Nagisa needs to make two train changes to get back to his place. He doesn't mind that, it is what it is, but the chances of getting stuck somewhere are heightened if he leaves it too late into the night. Not that that's the top of his priorities, considering what just happened.

"U-uhm," Nagisa refastens his trousers with absolutely no grace, and half stumbles towards the door. "T-thank you f-for the lesson. It was helpful!"

"Any time," Karma waves him off casually.

He goes bright red, and ducks down into the genkan, pulling his shoes on so fast he almost trips. Out of one moment of politeness, he slightly lowers his head, before opening the door and then slamming it behind him. Only when he's outside, in the brisk cool air, Nagisa catches his breath properly. What just happened?

And, what does Karma mean by 'any time'?