Chapter Text
Going to bed together was relatively uneventful, even if it was some of the weirdest energy Izuku had ever encountered in a bedroom. Katsuki was considerate enough to chuck an unused toothbrush at him, but didn’t offer much else.
Eventually, Izuku stripped down to his t-shirt and boxers, laying flat on his back on one side of the bed. He’d showered at his agency before coming over, so at the very least, he was clean. He didn’t bother pulling the covers back though, feeling maybe they needed that physical separation right now.
Katsuki switched off the light, plunging the room into darkness before he stomped over to the bed. He threw the covers back, collapsed into the mattress and pulled them back over himself, curling away to the far edge.
Minutes ticked by as Izuku stared towards the ceiling, hands laced over his stomach as he counted breaths in the body beside him. Shallow and quiet. Controlled. Katsuki wasn’t falling asleep. Izuku glanced over and registered the hard line of tension across his friend’s—partner’s?—lover’s?—shoulders. He frowned at the part of his brain that imagined flashes in bright red and orange over Katsuki’s head—
WARNING. DO NOT ENGAGE.
Setting his jaw and willing them away, Izuku rolled towards Katsuki’s back. Those warnings? They were vestiges of a time before. Hard to shake because they were relevant for many, many years.
Izuku thought about the police station, about what happened when Katsuki thought they were alone. He hadn’t blasted Izuku away. He’d let Izuku kiss him and pulled him in. Melted against him in relief at Izuku’s touch and thanked him afterwards. Maybe it had just been a distraction from that terrible moment, but it had felt good and right. Nothing like what happened at the doorway earlier but maybe they weren’t such different things, even if the latter had felt wrong in form. Katsuki needed that respite. Izuku could give it, but on his own terms.
“Hey...” Izuku spoke quietly as he put a hand on Katsuki’s back. Katsuki’s shoulders drew up further and Izuku frowned. He pressed on. “Today was hard.”
He shifted forward, running his hand up Katsuki’s spine to curl and knead at the stress in his neck. Katsuki didn’t say anything, but he also didn’t pull away.
“I’m sorry that you had to do that. Bring Akagi in and... let her talk about you. But it was the right thing to do. You did your job, Kacchan. You did what heroes do, no matter the cost to themselves. And it wasn’t a worthless sacrifice. The connection was there. We just didn’t see it from the right side. We would have got him eventually...”
Katsuki tensed further and just when Izuku thought he’s continue to ignore him, he muttered a reply.
“Haven’t got him yet.”
Izuku squeezed softly at the juncture of shoulder and neck. “We will.” he replied with certainty. And he was, certain. They would get Nakamura in the end.
Katsuki sagged a little, grunting noncommittally. It was probably the best Izuku was going to get from him. Izuku shifted further to place a gentle kiss along Katsuki’s spine, sliding his hand around Katsuki’s belly to pull him back. Katsuki shifted easily and Izuku thrilled even with the blankets between them.
“Thought you didn’t wanna do this,” Katsuki rumbled.
“Do what?” Izuku asked, eyes closed as he nosed along the short hairs at the nape of Katsuki’s neck.
“Fu—” Katsuki sighed and shifted at another press of lips. “Fuck around.”
“Never said that.”
“Oh really? You pretty clearly rejected me earlier.”
Izuku paused, blinking into the darkness. “I wasn’t rejecting you. I was rejecting... the form of activity you were proposing.”
Katsuki snorted, twisting to look over his shoulder. “The form of activity I was—You fuckin’ dork.”
“Yeah, yeah...” Izuku hummed, “I’m a dork. A nerd. An embarrassment to myself and others—”
Izuku slid his hand up Katsuki’s chest to his jaw, guiding it into a kiss. Katsuki melted against him and it was all Izuku could do to keep going without smiling like an idiot and ruining everything. That feeling from before, from the police station, it was there again, warm and gushy in his chest. Katsuki relaxed into his arms with every soft caress and clever slide of Izuku’s tongue.
For someone who proclaimed to be so staunchly against “that sappy shit,” Katsuki’s protests went silent in the face of the actual act.
Breaking the kiss, Katsuki turned over fully on the bed, kicking the sheets away to sling a leg over Izuku’s hips. A warm hand drew Izuku back in, more urgent than before. The wet sound of lips and tongues filled the room.
Izuku’s hand slipped down to his collar, fingertips tracing the edge of taut muscles in Katsuki’s neck. Katsuki reached up and maneuvered it to his throat, pressing just enough for Izuku to feel the strain of a pulse against his palm. The leg around Izuku’s hips tightened, heel digging into the back of a thigh as Katsuki rolled his hips, hard.
Izuku broke away immediately, pulling his hand from Katsuki’s neck and planting it in the middle of his chest as he glared at the man under him.
“Told you I’m not going to hurt you tonight, Kacchan,” Izuku informed.
Katsuki growled up at him. “Fuck you, you fuckin’—”
“Just—Shut up and lie back!” Izuku snapped.
Katsuki’s mouth clicked shut.
With red eyes still boring holes in his skull, Izuku considered his options.
He couldn’t just stop again. Well, he could, but Katsuki would likely take it as another rejection. Not just of sex, but of his person. Katsuki wanted to be hurt. Maybe because he liked it. Maybe because, as he claimed, that was the only way to feel something other than horrible about this cluster of a day. Or maybe, Izuku thought bitterly, because he thought he deserved it. Whatever it was, it didn’t make Izuku feel good to do something like that right now. It felt wrong. So, he wouldn’t. Maybe, one day, if Katsuki was really into that, they could try some things. Just... not today.
Even if he was trying to steer them in that direction, it wasn’t like Katsuki wasn’t responding to the gentler things Izuku was doing. Maybe he did want them, even if he kept saying he didn’t.
“Well?” Katsuki asked through his teeth.
“I’m thinking.”
“Think faster. You’re makin’ me limp.”
Izuku snorted, but Katsuki only continued to glare at him, stiff as a board beneath Izuku.
Katsuki needed to relax. He needed his mind to be off the things that happened today. Maybe he needed to relinquish a little control, too. Izuku could... work with that.
“Give me your hands,” Izuku said.
A beat passed as Katsuki stared at him. Finally, he moved his arms, presenting them like he was about to be arrested. Izuku rolled his eyes. With one hand, he took both of Katsuki’s wrists, guiding them up and pining them on the pillow above Katsuki’s head. Not hard, just holding them there. Katsuki could easily pull away if he wanted to.
“Is... Is this ok?” Izuku asked, biting his lip.
“Yes.” Came the immediate answer.
Well, of course it would be. Izuku was gently holding his wrists instead of squeezing his throat.
Izuku angled Katsuki’s head back with his other hand, baring his neck. This was the easy part. Kisses along the jaw. Along the tendons of his neck and across his clavicle. Izuku’s free hand kneaded at the soft swell of Katsuki’s chest and eventually the body beneath him shuddered and released a shaky breath.
All the while, Izuku kept a grip on Katsuki’s wrists. If he couldn’t use his hands, he couldn’t try to grab or pull or push Izuku into doing anything he didn’t want to do.
His free hand slid to Katsuki’s side even as his lips worked their way down the center of his chest, bare for sleeping. Katsuki arched into him and Izuku took it as a good sign that he wasn’t trying to break free or wrestle back control. More confident in his actions, Izuku pressed the leg over his hip back and away. His hand slid from Katsuki’s knee to palm his half-hard erection through the soft cloth of his sweatpants and Katsuki bowed off the bed with a moan.
It was easy enough to work Katsuki through the fabric, feeling out the shape of him with clever fingers until Katsuki was hard and eager again, breathing in quick pants as Izuku held him against the bed. After all, how many times had he done the very same to himself after a long and grueling shift to work out the tension and finally be able to sleep? Because even when the body was exhausted, sleep sometimes came slow to a racing mind, especially when an open cased plagued it after hours.
“Quit—ah—Quit fuckin’ teasing, Deku!”
Izuku slowed his hand and Katsuki groaned a protest. Guess it’s time for phase two.
Pressing Katsuki’s hands down for emphasis, Izuku commanded him to, “Stay.”
He let go and Katsuki obediently curled his fingers into the pillow to hold himself there. A heady feeling spun from Izuku’s chest into his throat, threatening to make him lose his mind a little.
With both hands free, Izuku repositioned himself down the bed. Grasping the elastic of Katsuki’s sweats, he pulled them down and off until Katsuki lay on the bed completely naked. As before, he wasn’t wearing anything beneath the pants, but his face was considerably less smug laying back with his eyes half-mast, mouth parted gently and arms still above his head.
Izuku let his eyes trail from the blush on Katsuki’s face to the one between his legs. With a deep breath, he kneeled between them. They spread further to make room for him. Izuku ran a hand along Katsuki’s inner thigh and dipped his head, breath ghosting along the hard length in front of his face. Izuku opened his mouth, balked, closed it again.
“You’ve never done this before,” Katsuki said.
Not a dig, just a statement.
“No,” Izuku replied, then smiled, “But I—”
“If you say some shit like ‘what I lack in experience I’ll make up for with enthusiasm.’ I’m puttin’ my pants back on.”
Izuku chuckled. “I was going to say ‘I’ve had blowjobs before and I understand the general mechanics of them.’”
“’Course you fuckin’ were,” Katsuki huffed, “Bet you watched porn and took notes, too.”
Izuku blushed and looked away.
“You did, didn’t you! You fuckin’—fuck!”
Izuku smirked, tongue still poised at the tip of Katsuki’s dick.
“Sorry, what was that, Kacchan? I couldn’t understand over the sound of you moaning.”
“You’re such a little shit, you know that? You—ah!—Fuck, Deku!”
Izuku would have smirked again if his mouth wasn’t otherwise occupied. Despite his momentary hesitation, giving a blowjob wasn’t all that different than eating someone out. Sure the hardware was different but the action itself was the same. Find the sensitive parts. Move your mouth and tongue and lips in a manner pleasing to those parts. Listen to the noises coming from your partner to know—
“Teeth! Teeth!” Katsuki grit.
—Make sure to watch your teeth.
Izuku pulled away and muttered a quick “Sorry!” before getting back to work. Katsuki squirmed on the bed, still gripping the pillows, legs drawing up as his hips jerked. Izuku hooked both hands around Katsuki’s thighs to keep him in place, not enthusiastic about deep-throating on his first try.
When he felt a hand on his head and fingers digging into his scalp, Izuku frowned and pulled off again. Katsuki groaned in frustration.
“Hands above your head, Kacchan.”
Katsuki looked down at him with pleading in his eyes and Izuku almost caved.
“Hands up...” Izuku warned, “or I’ll stop.”
With a frustrated growl, Katsuki moved his hand back up, white-knuckling the pillow. Izuku kept eyes on him as he dipped his head. As soon as Izuku’s mouth was back on him, Katsuki’s eyes screwed shut and his chest heaved.
Once he had a rhythm down, Izuku could watch Katsuki come undone in the dim light of the room. Fingers twisting as he kept his hands in place, brow drawn down over closed eyes. Dark smudges at the edge of his eyelids remaining from the greasepaint he wore under his mask, too hastily removed. Face, neck and chest a pleasing shade of dark pink. Stomach contracting as he drew close to his climax.
Still beautiful, Izuku’s mind supplied. As if to reassure him that, yes, he really was into Katsuki. Holy shit.
Izuku released one hand from Katsuki’s thigh, raising his own hips to give himself room to push a hand into his boxers and stroke himself, as if he’d only just realized how painfully hard he was as well.
“Gon—Gonna cum!” Katsuki warned him.
Maybe it was to give Izuku an out. If he didn’t want the full ‘experience’ he could back off. How could he though, when Katsuki was making a face like that?
Izuku rode it out, found the taste not nearly as terrible as he’d been expecting, even if the texture was, frankly, gross. He swallowed, wiped his mouth and dove to kiss the breath from Katsuki’s mouth even as he jerked himself to completion on Katsuki’s still shuddering stomach.
———
“Do you feel better?” Izuku asked, one arm slung back over Katsuki’s waist—now that it was clean, of course—snuggled up together under the soft weight of the blankets.
“Mmm...” was Katsuki’s only response.
Izuku smiled. Katsuki was finally relaxed, barely able to make words through his exhaustion.
“So...” Izuku started, still feeling bold and a little smug. “How did I do?”
Katsuki was quiet for a long moment, as if tallying a score in his head. Or maybe because he fell asleep and—
“B-minus”
The grin fell from Izuku’s face.
“I... I’ve never gotten a B-minus in my life!”
“Guess you’ll have to keep practicin’, nerd.”
Izuku couldn’t see Katsuki’s smirk very clearly in the dark, but he could feel it in his bones.