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Izuku's used to teaching one-time classes for small groups. The occasional visiting lesson or seminar adds a little variety. He gets to visit other places and meet new people, but the classes are for beginners. It becomes dull, repetitive. He doesn't expect this time to be any different. But he's also never encountered old childhood friends at any of his classes.
"Deku? What the fuck?"
He turns to respond but freezes. No part of him ever expected to see Bakugou Katsuki again, but there he is, nearly knocking the breath out of Izuku. The only thing bigger than his back muscles are Izuku's eyes as he stares, wide-eyed, as they cross paths for the first time since middle school.
There's no malice in his voice, and Izuku doesn't flinch. He's too shocked, too consumed by the need to stare. Katsuki doesn't seem bothered, not that Izuku really knows how to read him anymore.
All right, that's a lie. There are some things he'll never forget, and for Izuku, that includes every curious thought he's had about Katsuki since childhood. But his expression is so neutral that Izuku feels almost guilty. Especially about the way his eyes instictively trail the expanse of his towering figure, every single rippling muscle, and hands that look like they could break someone in half. Hopefully Izuku.
"Why are you here?"
Izuku feels sheepish. This wasn't his idea and he didn't know Katsuki would be here, but he feels exposed like this. Katsuki looks so comfortable and confident in his own skin and Izuku wants to crawl into a hole.
"K-Kaccchan? I mean, Ka- Bakugou? I'm- I'm teaching a class. A yoga class," Izuku admits, scrubbing a hand over the back of his neck. "I'll be teaching all of you."
Katsuki looks completely taken aback. Sharp red eyes flicker over his body once, then once more, but slower. Suddenly feeling hot under the attention, Izuku wonders what he looks like to Katsuki now that they're adults.
"It's been a long time," Izuku says when the silence drags on for an uncomfortably long period of time. "But, uh, you're a firefighter! Right? You're with the others here for the class?? That makes sense. I can see it, that makes sense."
Afraid that he won't be able to stop rambling, Izuku clamps his mouth shut, trying not to embarrass himself anymore. The neutral, almost emotionless look on Katsuki's face shifts into mild amusement.
"No offense, but I don't think this whole thing is necessary."
He's not offended. Really. People tell him that all the time, and he's accustomed to it. It's one of his least favorite parts of leading short courses like this. He gets hired to teach a few basic flexibility techniques, and every time he starts, someone will inevitably question the legitimacy of his entire career. Some of the people who actually have to attend these singular sessions don't want to be there. The ones who hate it make Izuku dread these sessions. He's used to it, but it's still tiresome. Izuku sighs.
"I've already been paid to teach you and your coworkers," Izuku reminds him, suddenly more comfortable when he can talk about his job instead of stumbling over his words. "It's not as weird as you think. Plus, it's not just good for flexibility, but also encourages relaxation, healing, and mental fortitude."
There's an eye roll in response, but at least Katsuki doesn't argue. He starts to walk off, but Izuku stops him with a hand on his bicep. A very noticeably, visibly strong bicep. Katsuki raises an eyebrow, waiting.
"Will you let me show you? You probably don't believe me."
When Katsuki abandons their eye contact to look at the hand on his arm, Izuku yanks his hand away, suddenly self-conscious and extremely aware of the shared touch.
"Just... join the class, okay? It's not terrible."
He desperately wants to over-explain himself, but manages to clamp his mouth shut. They weren't friends when they parted for different high schools. It's weird enough that they recognize each other, and even weirder that Izuku's trying to be on his best behavior to . There's always been something about Katsuki that makes him want to do his best.
Maybe it has something to do with the way Katsuki's chest strains against his shirt like it hates to be contained.
"That's your endorsement, huh?"
The amusement in his voice makes Izuku want to swoon. But he can't. He's reasonable. And definitely not swooning at all. Katsuki looks up and down his body again, and this time Izuku feels his ears burn. He wants to cover every inch of himself, or maybe show him everything. He's still deciding what to say when Katsuki continues talking.
"Fine," comes out of Katsuki's mouth quietly. His eyes go wide for a second like he didn't mean to answer like that. "I'll give you a chance."
Something melts and burns inside Izuku like molten lava. Not giving his class a chance, him. Katsuki walks away and Izuku's left, red and hot from his ears to his neck. He's not sure how this will go, but he suddenly doesn't mind being here. He's a little excited.
-----
It's easy to settle into the rhythm of introducing himself and what he's about to teach. It's familiar, and the words tumble out of his mouth with little effort. He barely hears himself while his mind wanders. At least he keeps his eyes from wandering. Well, he looks around a little. But it's to look at everyone, not just Katsuki. Even if his eyes linger a little on the way those shoulders look in a dark, tight tank top. His pecs are so tight against the fabric that Izuku's sure he can see nipples. It's nearly miraculous that the shirt can survive under so much pressure from Katsuki's chest.
Izuku shakes himself mentally, backing up towards the front of the room so he can keep looking around the room while he returns to his own mat.
"Breathing exercise first, all right?" Nobody interrupts him, which is a good sign. "It's important here, but it's also important in our daily lives. It's good to be conscious of our breath sometimes. Being careful about how and what we breathe in and out of our bodies, our lives. So we'll start there."
A brief snort of laughter catches his ears, but all Izuku sees is Katsuki glaring steadily at one of the other men in the room. The sound disappears and Katsuki looks away. For a brief moment, their eyes catch. The corner of Izuku's lips turn up slightly in gratitude before he starts guiding everyone through slow, deep breathing.
Nobody protests when he starts showing them their first pose. It's simple, barely more effort than sitting casually cross-legged. Still, he walks around the room, occasionally speaking loudly enough to remind everyone to inhale and exhale slowly through their noses. Mostly, however, he murmurs quietly to people individually.
"Can you straighten your legs more?"
"Stay aware of your posture."
Little words of encouragement so everyone feels acknowledged. With the next pose, it's a little trickier. He walks around, touching someone's shoulder when they won't straighten properly. Someone's hips are twisted off-kilter in a way that must be painful, so Izuku nudges him into the right position. When he reaches Katsuki, there's no excuse to touch him. His form is perfect, though he looks tense.
"Here," Izuku says without meaning to utter a word. His hands brush over shoulders and they feel just as perfectly hard as he expected. "You're holding yourself with so much tension."
He doesn't relax under Izuku's hands. If anything, he becomes considerably tighter. Izuku rubs his hands in soothing circles. By the time Katsuki relaxes minutely under his hands and Izuku backs away, the realization of what he's doing hits him. Massaging a student. A student that he's incredibly, distractingly attracted to.
"Thanks," Katsuki mumbles.
Izuku nods and quickly retreats back to his own mat. There are a few disgruntled noises when he tells them to lie down on their stomachs, but the sound of discontent disappears quickly. While he shows them how to support their bodies with forearms and to lift their chests, Izuku wonders if the quiet is thanks to a sharp glance from Katsuki again.
"Keep your legs on the ground, and keep them together," Izuku instructs. "Think narrow hips and legs. Keep them comfortably together."
He gives them more time to adjust to the pose on their own this time. But to him, it's a habit to walk around, offering gentle encouragement here and there. When he gets to Katsuki, he's surprised to see his legs are a little too wide.
"Narrow," Izuku reminds him. "Keep your legs closer to each other."
There's a slight wiggle, but he doesn't close the gap between his legs. Izuku's used to simply touching and gently shifting bodies into place, so he doesn't think before he crouches down to gently nudge his legs together. He moves easily under the touch. Izuku's hands freeze on the outside of Katsuki's thighs. The easy movement proves it's not difficult for Katsuki to move himself, yet he hadn't done as instructed. He wanted Izuku to show him what to do. Or at least to touch him.
"Just like that," Izuku says softly, still not removing his hands.
It would be so easy to kneel over Katsuki. To straddle his thighs and feel the firmness of those thighs under his hands and against Izuku's aching body. He tries not to think about it, but he doesn't step away.
"Yeah? Is that working for you?"
The soft low timbre of his voice goes straight to Izuku's cock. The words catch up to Izuku's brain and he jolts away, looking anywhere but at Katsuki.
"That's better." Izuku's proud of the way he keeps his voice from wavering.
He hurries away, trying to calm his racing heart. It doesn't entirely work, because he worries his voice sounds a little shaky as he starts to guide the participants through how to move easier between poses. He knows they're all a little stiff, and Izuku tries to help them smooth their transitions.
And he can't stop thinking about Katsuki's question. An almost innocent question that sounded so sultry to Izuku's ears. Especially when he moved so obediently, exactly as directed.
To keep his mind busy, he helps a few people, murmurs words that he hopes are helpful, but he stops in front of Katsuki. This time he looks frustrated. His movements are jerky and getting worse every time he tries.
“Let me help.”
He doesn’t wait for an answer; he would step right in no matter who needed his help. He places his hand over Katsuki’s hips, gently easing him into place.
“Try again,” Izuku says quietly, hyper-aware of how close they are to each other. There’s so little space between them, but stepping away isn't possible. Instead he moves closer until their bodies nearly touch. One hand maintains a grip on Katsuki's hip and Izuku wraps the other around his arm just above the elbow.
He lets Katsuki shift into pose, merely guiding him along a little. Izuku stays there, moving with him through several transitions to help him get used to the movement. And just as Izuku begins to think of backing away, Katsuki goes almost shaky in his hands.
"Are you okay?" Izuku asks, alarmed, stepping back to examine Katsuki, up and down.
"I'm fine," Katsuki hisses out.
A couple heads turn to glance but Izuku waves them away, urging them to focus on their posture, mindset, and movement. At least he hopes the words he says are encouraging because he doesn't know what he's saying. All he can think about is the way Katsuki feels in his hands. He spares a small smile for anyone who glances his way before returning his hands to Katsuki's arms.
"You're shaking," Izuku murmurs, more quietly this time. "Are you in pain or—"
Katsuki shakes his head sharply. It's obvious looking at him that tightness is gathering in his shoulders. Izuku wants to smooth away every stressed inch of his body.
"You're all tense again."
"It's because your hands are fucking everywhere—"
The sentence falls away, unfinished, and Izuku steps away abruptly. Arms falling to his sides, he backs off, putting space in between them. He overstepped. He was so wrapped up in how perfect Katsuki felt, he hadn't really thought about how his actions might be received. Katsuki probably hates him for letting his hands wander.
"I didn't say I didn’t like it," Katsuki says in a whisper that's barely audible.
Every thought flies out of Izuku's head. Katsuki's form looks so much better now but Izuku's not looking at that. Just at that earnest, gorgeous face — looking nervous as hell.
"Oh.”
He doesn’t have a clue what else to say, but Katsuki looks at him expectantly. After a moment of hesitation, Izuku moves close again, walking around to stand behind him. This time his hands fall to Katsuki’s hips.
“Is this okay?”
Katsuki nods, leaning back until he’s up against Izuku’s chest. The temptation to correct his posture is strong, but Izuku just sighs instead. The light contact between them makes him want to melt. Sweat prickles at Katsuki’s skin. He wants to lick it off. Izuku’s suddenly, very aware of just how aroused he is.
He wants to pull Katsuki hard against his body and grind into him. Considering the way he leans so heavily against Izuku, he’d probably accept if Izuku ground his half-hard dick against his perfect ass.
A heavy sigh behind them makes him suddenly aware of just how inappropriate this is. There are people all around them, and Izuku is supposed to be teaching them. Before he backs away, he drags the tip of his nose over Katsuki’s skin, nuzzling at the base of his neck. It’s brief. He doesn’t even know why he does it, but Katsuki shivers at the touch. Izuku finally backs off. The space between them is suffocating.
“Don’t tease,” Katsuki says, breathy. Almost whiny.
“You haven’t seen teasing yet.”
As he walks away, he feels the heat of Katsuki’s gaze on his back.
It’s almost impossible to continue with the class, but he does it. Somehow he manages to walk them through two more positions. He carefully stays away from Katsuki, but he can’t help looking towards him. Drawn in like he's the only light in a dark room. Their eyes meet, only breaking apart when they absolutely must.
He has no idea how he manages to finish the class. All he knows is that he's saying words that feel practiced enough to use as a farewell and watching most of the firefighters leave the room. Not just most. All but one.
"You're one hell of a teacher."
It's startling to hear Katsuki's voice loud and clear after their quiet whispers earlier. He jumps a little. Izuku bends to pick up his mat. When he stands, Katsuki's suddenly so much closer than expected. Close enough to touch.
"Oh, you're—"
He steps away. Or tries to. But before he can, Katsuki grabs his arm, stopping him in his tracks. The hand on his skin is hot, slightly damp, and Izuku doesn't want it to disappear.
"Yeah, I'm," Katsuki agrees, not taking his eyes off Izuku, except to look at Izuku up and down carefully. "And you are, too."
He nods. He doesn't exactly know what he's agreeing to, but at the same time, he knows they're on the same page. They both want something. The same thing. And fuck, he is so willing to find out.
"Can I—" Katsuki starts to ask.
But before he can finish the sentence, he's quickly cut off. Without pausing to consider it, Izuku swallows Katsuki's next words with a kiss. Even his mouth is hot to the touch. Or maybe it's the light workout warming his skin to the touch.
It’s supposed to be a brief kiss. But instead of making his intentions obvious with a quick kiss, it shifts into something deeper the moment big hands wrap around Izuku’s waist. Katsuki kisses him desperately, like he couldn’t possibly get enough. Like he’s stealing the air from Izuku’s lungs. It’s impossible to breathe or even think like this but Izuku doesn’t even consider breaking away.
“You’ve had your hands all over me,” Katsuki grumbles, barely pulling his mouth back enough to speak. “It’s my turn.”
He’s not exaggerating. Big warm hands feel like they’re everywhere, drawing Izuku close. Every brush of skin on skin feels like fire, hot and all-consuming. When Katsuki breaks the kiss, Izuku whimpers, tries to follow. But those perfect hands wrap tenderly around his throat, thumbs coming up under his chin.
"What's wrong?" Izuku asks, voice barely above a whisper.
"Not a damn thing."
Katsuki's answer comes without hesitation, and he follows it up with another kiss that takes Izuku's breath away. Hooking his arms over the broad shoulders that he's been admiring since their first conversation, Izuku holds on tight and braces himself to pull his legs up around Katsuki's slim waist. Their mouths barely part except for Katsuki to gasp in surprise. Wrapping himself around Katsuki just feels right. The heat between their bodies spurs him on to press harder, closer with everything he can — fingers, tongue, thighs, everything.
Fingers dig harshly into Izuku's hips, keeping them as close as possible. When he lifts a hand to the back of Katsuki's head, there's resistance he hadn't expected.
"I need—" Katsuki starts but he stops for a moment to clear his throat and stare intently. "I need you to fuck me. Right now."
"Yes please," Izuku gasps out.
But when Katsuki's hands slide down the back of his pants, pushing at the fabric carelessly, he looks around. Suddenly he remembers that they're in an unlocked room and anyone could walk in.
"But maybe we should, ahh—" He yelps when Katsuki nips at his neck with sharp teeth. "Find privacy?"
Katsuki doesn't bother looking around before he carries Izuku to his own abandoned yoga mat. With a surprising tenderness, he settles on the ground so Izuku is straddling his lap.
"Or you can take me right here. Right where you started this. If that’s okay.”
The hint of hesitation is endearing. Izuku surges forward to kiss him again, catching him by surprise or with just enough force that Katsuki's balance slips and he lands on his back. Not that it matters.
Not when there’s a tongue in his mouth and fingernails scratching down his back. When he finally takes a moment to breathe, he stares down at where Katsuki's breathing hard. His skin already gleams with sweat, and Izuku watches the way his chest rises and falls with every breath.
"You coming back down here, nerd? Or are you gonna stare all day?"
Katsuki's stare is intense. Dark and needy and never leaves Izuku's face except to glance up and down his body. Izuku doesn't want to look away. Somehow he manages to tear his gaze away long enough to get up.
"What the fuck are you doing?"
Katsuki's demand sounds more whiny than anything else, but he snatches Izuku's wrist to stop him in his tracks.
"We need— I have, in my bag—"
Katsuki doesn’t let go.
"You’re so stupid," he grumbles out with no heat in his voice. "I'm already wet for you, dumbass."
If he was spared enough time to think, Izuku would feel embarrassed for forgetting. But he’s quickly by the way Katsuki pulls at his arm until he falls onto his knees. Straddling him again with one knee on either side of him, Izuku tugs roughly at clothes, losing track of his own hands until all that's left between them is their underwear.
"God you're so hot," Izuku breathes out, stopping to stare again, running his fingers over Katsuki's bare stomach reverently.
Eyes rolling but saying nothing, Katsuki grabs Izuku by the hips and pulls. Izuku whines when his cock brushes up against the wet fabric of Katsuki's underwear. Even with the layer of fabric in between them, it's perfect. Rocking their hips to meet each other, the head of his cock straining as Izuku grinds against Katsuki.
"Enough," Katsuki says with a gasp. "Want you inside me. Now."
Desperate. The absolutely beautiful desperation in his voice makes Izuku want to give him everything he wants.
"Yeah," he whispers, out of breath. "Whatever you need."
Katsuki yanks down Izuku's underwear, not waiting for Izuku to do it himself. His cock springs free, and Katsuki's eyes follow the motion. But Izuku can't wait while he takes in the sight. Instead, gripping tight to the fabric hugging Katsuki's hips, Izuku drags it down as quickly as he can, pulling it off in a couple smooth moves.
On instinct, Izuku drapes himself over Katsuki's legs, using a hand on either hip to pin him down. Katsuki spreads his legs wide and Izuku's grateful. It might as well be an invitation. Exploring with his tongue feels so utterly natural, Izuku groans against him. It's perfect. He twitches and kicks under Izuku, trying to arch up to meet his mouth. But there's no room for him to move. Not with Izuku holding him down so effectively as he explores every inch he can reach.
"De-Deku."
The way he stutters out the name like it's beautiful makes Izuku smile. He pulls away just enough to look up. There's no other verbal response from Katsuki for a moment and Izuku realizes the bottom half of his face is dripping wet.
"I always wanted to hear you say my name like that," Izuku admits.
He dips his head to continue tasting every bit of Katsuki, but he's held back. Shoved back, more accurately. But before he can voice a question or concern, Katsuki's wrapping his feet behind his back, digging heels into Izuku's ass while pulling him in close.
"Come on, Deku."
He pauses to twist his fingers through curly green hair, but he doesn't yank. Izuku doesn't say anything. For a moment he just enjoys the brief calm between them. Every last part of him buzzes with desire but that can wait. Katsuki just looks so pretty when he's desperate, Izuku has to let the moment stretch as long as it can.
"Deku. Please."
He looks so open, almost fragile. They barely know each other now but he doesn't just look desperate to get what he wants. He's vulnerable. Izuku doesn't waste another moment before he drops over Katsuki's body, guiding his dick inside. He tells himself he'll push in slowly at first. But he can't. Not when Katsuki thrusts up to meet him, gasping when Izuku's fully inside him.
"You feel so good, Kacchan." He can't keep the awe out of his voice. Not that he tries. "I used to think about this. As soon as I was old enough to think about it. I wanted to know what you'd feel like underneath me."
"De- Izuku."
Nothing prepares him for the way his real name sounds on Katsuki's lips. It shakes him to his core in a way he doesn't expect. He drops his head onto Katsuki's shoulder, scraping his teeth and teasing a mark onto his skin. When he pulls almost entirely out, he's thrown off by the way he's rolled onto his back.
"You're too damn slow, Izuku," Katsuki grumbles, but dragging out his name like a threat. Or a promise.
As Katsuki sits fully on his cock, all Izuku can do is look up at him. Izuku tries to reach up, tries to meet him with every thrust, but he's immediately stopped. Katsuki's hands hold him down, mirroring the way Izuku had held his hips earlier.
The only thing Katsuki lets him do is trail his hands everywhere he wants. All over every inch he can reach, Izuku's touch alternates between reverent and defiant. He touches and pinches and drags his nails across Katsuki's skin. At moments he feels like he's staking a claim. At other times, he simply feels like he's signing his name, acknowledging that he was here. No matter how his marks will be read later, Izuku feels a stinging pride to know they'll be seen at all.
"You're so damn cheesy," Katsuki laughs, but the sound isn't mean. "Fucking rambling about leaving your mark on me, huh?"
Izuku blushes at the realization that not all his thoughts stayed silent. He starts to stammer out some semblance of an explanation, but his mouth is covered with two fingers. Katsuki kisses his own fingers and Izuku desperately wants to feel those lips on his own again.
"You really want to put your cute mouth to use, don't you?"
An eager nod makes Katsuki grin. It's a devious look but Izuku just feels his dick twitch at the sight. When Katsuki pulls off, putting an upsetting distance between them, Izuku whines. His cocks aches, now leaking. He's so close Katsuki's so damn far away.
"Don't think about later, dumbass," Katsuki insists. "Don't talk about it either. You want to do something with your mouth, huh? Need to keep it busy all the time?"
Izuku nods again, finally understanding what Katsuki's planning when he kneels on either side of his head and sinks down. Hands slip through Izuku's hair again, this time tugging him close. Not that he minds. With a hand around his cock and his tongue dipping inside Katsuki, all he can think about is how utterly perfect his Kacchan feels.
He comes all over his hand but he's so focused on pleasing Katsuki that he barely notices anything beyond a sense of relief. Nothing's better than Katsuki with his head thrown back in pleasure, thighs tight around Izuku's head.
"Fucking- perfect," Katsuki barely manages to get out.
With another tight yank of Izuku's hair as he repeatedly presses his tongue against every sensitive spot, Katsuki comes with a yell, squeezing Izuku's head. Even after he comes down, Izuku keeps licking and sucking and dragging his tongue, hoping to urge another orgasm out of him.
"God, you have to stop or I'm going to explode."
Izuku flicks his tongue inside one last time, just to feel Katsuki squirm, before listening to the demand and pulling away. All the prodding and pulling and squeezing desperating between them fades but still Katsuki collapses next to him. He really is perfect.
Several long moments pass before Izuku realizes he's staring, and even then it's only because Katsuki grins at him. Before he can utter a single teasing word, Izuku surges forward to kiss him again. It's different like this. There's no urgent need to find release. But Katsuki still meets him, digging his nails into Izuku's thigh and kissing him right back. It's brief and nothing like their kisses earlier. It's everything Izuku didn't know he could ask for.
"Hey, loser," Katsuki starts with an insult but his tone is so gentle the word is impossible to believe. "I wanna join one of your real classes sometime."
He looks so subdued and nervous despite everything they just did together. Izuku kisses the corner of his mouth.
"Only if you let me take you out on a date first."
A blush burns high on Katsuki's cheeks and for a moment Izuku thinks he's taken it a step too far. Maybe there's no interest in an actual date. But then it's Katsuki's turn to kiss him. Abrupt and breath-stopping.
"You fucking better."