Seeing Stars [NSFW]

Katsuki woke up slowly, taking his time to yawn and stretch a little, before rolling over sleepily. He reached out an arm, only to find an empty bed at his side, his eyes cracking open to investigate in response. It was possible he’d just missed, that Izuku was curled up on the far edge of the mattress because Katsuki made him too hot in the night or something – again – and had wound up out of his reach. But sure enough, when he peered out through sleepy eyes, Izuku was nowhere to be seen.

He groaned, falling onto his back again, his eyes not quite willing to stay open yet, despite his curiosity. Not to mention a hint of concern.

"Izuku?" Katsuki called pathetically, letting his eyes stay closed as he listened for an answer. "It’s not like you to be gone."

Footsteps hurried toward the room, and he blinked his eyes open a little better when the door creaked, a tiny smile escaping him when he saw the bright smile in the doorway.

"What, did you miss me?" he teased, running a hand through his messy hair in a stupidly attractive motion. "Sorry, didn't expect you to be awake yet."

"Do you sneak off like this a lot?"

"Never, this was the first time!"

"Come back, then."

He hesitated for a moment, but when Katsuki held an arm out pathetically he couldn’t resist, diving back under the covers and pulling Katsuki into his embrace.

"You're too cute," Izuku mumbled into his cheek as he kissed it. "Quit it."

"Sorry."

"Do you know what day it is?"

"No. Should I?"

"Kinda."

"Sorry, I'm half asleep still," Katsuki mumbled, rolling over to look at him. "It’s... Wednesday? I guess? Have I forgotten something important?"

"Ah... no, it’s okay!"

"Let me sleep more then."

"Okay," Izuku laughed, snuggling in closer. "You go back to sleep."

Katsuki sighed contentedly as he finally closed his eyes again, Izuku’s arms warm around him, soft hair tickling his neck whenever he moved.

"So what day is it, then?" Katsuki asked quietly.

"Later."

"Tell me."

"The twentieth of April."

"Mmn. And?"

"Idiot," he chuckled, kissing Katsuki’s neck lightly. "Your birthday. How do you forget your own birthday?"

"Oh. You were up doing stuff for me?"

"Uh-huh."

"Now I feel guilty."

"Don't. If you want your day to start with sleepy cuddles, I will happily oblige!"

"I always want that," Katsuki mumbled, burning red when Izuku laughed at him. “Shut up.”

"Uh-huh. Shhh. Go back to sleep, it’s our day off for a reason."

"Okay. Stay."

"I wouldn't dream of leaving."

Katsuki snuggled in comfortably, leeching Izuku’s body heat, and for once he didn’t complain about the way Izuku smiled into his hair, hiding his amusement from Katsuki’s view – even though Katsuki could feel it. He just let it happen, for that one morning, and focused on enjoying the rare moment of peace and quiet and comfort between them. So often they were rushing off to work at ass o’clock in the morning, even on their supposed days off, but Katsuki’s phone hadn’t rung once. He suspected that was probably Izuku’s doing – he probably had a friend intercepting any calls that were meant to be aimed their way, ensuring he and Katsuki got their morning off for his birthday.

Sappy nerd.

It didn’t take long for him to drift off again, despite the small part of him which wanted to stay awake and relish it. He was just too cozy, too comfy, too exhausted after a long day prior, dealing non-stop with idiot villains who seemed determined to keep him busy. He’d have loved to just make the most of their time together, of their warmth, their comfy bed, and the thick blankets. But the pull of sleep was just too great, and soon he was snoring into Izuku’s chest, unaware of the fond looks Izuku gave him despite the horrific noise.

He was so gone.

─────

Katsuki watched from the bed as Izuku dug through the closet, smiling at his back – well, something in that general area. The view was pretty decent, with Izuku clad only in a pair of red satin boxers – he’d even forgone the All Might designs, for Katsuki’s special day. How sappy.

He finally held up what he'd been digging for, an unassuming white bag tied with a little bow, and held it up with a gleeful look on his face.

"I got this a few months ago!” He explained. “Thought I’d lost it for a minute there, but yeah, I had the idea and had to act fast, before I forgot!"

"What is it?"

"Take a look and see!"

He tossed it onto the bed lightly – not fragile, then – and Katsuki heard metal rattle as it landed right in front of him, all but in his hands. A little tentatively he paused to feel it for a moment, trying to identify the shapes through the cloth, and Izuku just waited, despite his general excitement and impatience when it came to gifts. Finally Katsuki pulled on the bow, letting the bag fall open, and reached his hand inside.

Metal. He’d known that from the sound. But also... Something soft?

He tipped the contents out onto the bed, jaw falling open when he saw the metal rings lined with soft green cloth, his face burning hotter than he thought he’d ever felt it. Izuku just grinned at him, entirely unphased even though Katsuki was mortified, though his god-damn boner sure as hell hadn’t gotten the memo.

"Really?" Katsuki asked, a little apprehensive. "Would you?"

"Uh-huh. That's what you're into, right?"

"Well, it’s... a big one, yeah."

"Well then get those damn pants off so we can get started."

Katsuki burned red again but reached for his waistband obediently, letting Izuku sit back and watch him strip off his warm sweatpants. The old, worn tank top came off next, cast aside with the pants. Izuku moved closer as he shed it, and the moment it was off, Katsuki left bare-ass naked on the covers, he felt metal lock around his wrist.

The little smirk Izuku shot him was the most attractive thing Katsuki had seen in years.

"You're gorgeous," Katsuki told him sincerely. "I love you."

"Quiet." Izuku smirked, snapping the other end onto the head of the bed. "Other hand."

Katsuki held it out obediently and watched him get to work on the next set, already aching with the anticipation of it all.

"Hold still," Izuku chuckled, patting his thigh lightly. "Almost done."

"Seriously," Katsuki mumble. "You're too perfect."

With his wrists and ankles bound, his dick rock hard and throbbing painfully between his legs, Katsuki was powerless. It wasn’t often that he gave up control of anything, let alone everything, but he trusted Izuku more than anyone else in the world, and he didn’t mind handing over the reins once in a while.

Scratch that, he fucking loved handing over the reins, it just... sometimes took a lot to convince him.

“One more thing,” Izuku whispered in his ear, swinging a knee over to straddle his torso.

“Mm?”

“One more present, that is,” he corrected himself, reaching for the bedside table. “I got this one a bit more recently.”

He shifted the gift into Katsuki’s line of sight, and Katsuki felt his eyes widen again, staring at soft, smooth leather and a little metal tag.

“You’re such a good boy,” Izuku praised, trailing kisses down Katsuki’s neck. “You’re gonna be good for me today, yeah? Let me spoil you for your birthday?”

“Y-Yeah.”

“Do you want to wear it, then? Try it out?”

Katsuki swallowed hard, not trusting himself to find words, and instead settled for a quick nod.

“Good.”

It took everything in his power to hold back a moan when Izuku fastened the collar around his neck, his body settling on breathing extra hard in its place, his chest heaving with the effort it took to keep himself still. Izuku smiled knowingly, caressing the thick metal buckle and the matching tag, engraved with Kacchan on one side, and Property of Izuku on the back, not that Katsuki could see that yet. He’d debated if it was too much, as he put in the order – whether Katsuki would be offended by being property, but thinking about it had made his own dick twitch in interest, so he’d been pretty sure he could get Katsuki on board too.

“There’s my sweetboy,” Izuku praised again, enjoying the way it turned Katsuki’s cheeks pink. “We gonna have some fun?”

“Y-Yeah.”

“What’s your safe word?”

“Bronze Age.”

“Why?”

“Because it was a super underrated hero costume and deserves more attention, no matter what form that comes in.”

“Good,” Izuku grinned. “Use it if you need to, tap out if you can’t talk.”

“I will.”

He brought his lips back to Katsuki’s, and Katsuki let his eyes sink closed as he leaned into it, letting Izuku take charge of the kiss. There was something special about the way Izuku took control of things in the bedroom sometimes, the way he made Katsuki’s brain go all quiet and fuzzy, his hands so light and tender on Katsuki’s skin that it made him shiver in anticipation.

The first time it had happened, when Izuku had kissed him so sinfully sweetly, his knees had buckled beneath him. Izuku, thankfully, had had the good sense to catch him before he hit the ground, to press him against a wall for stability, lips curling into a smirk despite the way they never once left his.

Izuku had never mentioned it again, but Katsuki knew they both thought about it a lot. Every time he took charge in the bedroom, for one, and whenever the topic of first kisses or public bathrooms came up.

Not the most romantic, or clean, place for his knees to have failed him.

“Feel good, birthday boy?” Izuku whispered, their lips barely parting.

“Very,” Katsuki blurted out, blushing when Izuku’s smirk grew wider. “I mean-”

“I’m glad,” Izuku cut him off, before he could take it back. “Just relax, baby, let me handle it.”

His hands trailed down to Katsuki’s chest, nails lightly raking over his nipples, sending a jolt through Katsuki’s body like a spark of electricity. He threw his head back, breath catching, and Izuku took it as an invitation, nipping at the pale skin with his teeth. The touch just made Katsuki shudder more, arms trembling where they pulled against his cuffs desperately, feeling the pressure of hard metal beneath the comfortable covers.

A whimper escaped him, and Katsuki would have been mortified by it if he wasn’t so busy being horny. Izuku knew exactly how to get him riled up – where to touch, and how, and with what. He probably had some creepy notebook somewhere, detailing every inch of Katsuki’s body and how to tear him apart, but Katsuki didn’t even have it in him to be annoyed by that thought. He was drowning in bliss, every other thought just floating away before it could take root in his brain.

He lifted a leg, hooking it around Izuku’s waist to pull him in closer, but Izuku just held his place, grinning. It was infuriating – or, would have been, if he had the capacity to feel it. All he wanted was to feel his partner’s body against his, but instead Izuku was holding firm, refusing to let Katsuki budge him, giving him a god damn wink when he tried his best to muster up a glare.

“Hold still for me, baby,” Izuku instructed, planting one more kiss on Katsuki’s cheek before he shifted lower, the warmth of his hands going with him and making Katsuki whine. “Gonna stretch you out so we can play.”

Izuku licked his lips as he sat himself between Katsuki’s legs, prying them apart to make room and chuckling faintly when they both curled back around his waist immediately.

“Next time I’ll get restraints for your feet, too,” Izuku teased. “For now, if you want me to fuck you, you’re gonna have to loosen up.”

Katsuki’s breath was ragged when he opened his mouth to respond, and it took him a moment to find the words, choking on his own air.

“I’ll try,” he promised, lightening up his grip obediently. “Fuck you’re hot.”

“Aww, thank you,” Izuku laughed, lying down on his stomach to find a comfortable position, then hiking Katsuki’s thighs up and letting them clench around his head instead. “You’re so cute when you’re being nice.”

“Shut up.”

“Aww, is that how my baby talks to me when I’m about to eat him out? That’s not very nice!”

Katsuki froze.

Izuku never ate him out. He was all about the fingers, about opening him up nice and quick then jamming his cock in there. Honestly, Katsuki wasn’t even sure what to think, let alone say.

“That’s more like it!” Izuku praised, splaying his hands over Katsuki’s thighs and feeling the taut muscles that lay there. “You’re such a good boy, keeping your rude words to yourself.”

Katsuki didn’t have a chance to find an answer, let alone a protest, as Izuku stuck his tongue out and dragged it pointedly over Katsuki’s hole, filling his body with a burst of searing heat. Honestly, Katsuki might have been able to get off on that one lick alone, if he hadn’t been so stunned by it.

“More,” he rasped. “Fuck! Please don’t stop.”

“You like that?” Izuku asked, swiping his tongue up and down over the hole lightly and watching Katsuki’s back arch, hips thrusting up in a search for friction that wouldn’t come. “You’re pretty when you beg for me.”

“Please,” Katsuki repeated. “Fuck, Izuku, shit! Please!”

Every touch filled his body with static, crackling like tiny explosions beneath his skin, and while he didn’t have a clue what he was saying, he could feel his mouth moving, babbling an endless stream of frantic words that he suspected were pleading him to keep going, to not stop. He felt sweat beading on his face as Izuku continued, his hips shifting at an unsteady pace as he bucked up into nothingness, not entirely sure if he wanted to push into Izuku’s mouth or pull away to give himself a reprieve from the stimulation.

All at once, everything in him seemed to shatter, and before he knew it, Izuku was holding him, caressing his sore wrists, whispering sweet words in his ear as they snuggled together, sharing their warmth. Katsuki’s legs were still quivering, his lungs still heaving rough breaths that came out in embarrassing pants, but Izuku was there, humming to him, stroking his hair, holding him close.

In Izuku’s arms, he always knew things would turn out okay.

“Hear me?” Izuku asked quietly.

“Mm.”

“Good.”

He turned his head slightly, meeting Izuku’s concerned gaze, and when he reached for the freckled cheek, he found his hands free of their restraints.

“Over already?” he croaked.

“Kacchan!” Izuku laughed, unable to resist despite his clear concern. “You were the one that stopped me, dummy.”

“Haah?! I know I never said Bronze Age.”

“You almost passed out! I’ve never seen you cum so hard before, and I didn’t even stick my dick in you!”

Katsuki felt his face burn, but then Izuku was kissing his flushed cheeks, murmuring praise into his warm, soft skin with those stupid chapped lips and stubbly face that Izuku always refused to do anything about.

“You gonna fuck me or not, nerd?”

“Not right now,” he chuckled. “We’re gonna have a hot bath, then I’m gonna make you your favourite breakfast, and we’re gonna snuggle under a big blanket while we eat it.”

“And then you’re gonna fuck me?”

“Damn right I am.”

Katsuki grinned, and Izuku returned it with his own, levering himself up on an elbow to press a kiss to Katsuki’s lips.

“After I find some rope.”