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Katsuki has been horny for various reasons in his lifetime. Hormones, drunkenness, adrenaline. A good day at work, a bad day at work. Hell, sometimes just boredom was all the excuse he needed to start thinking about a good dicking. But this? This is fucking ridiculous.
He stares hard at the mattress, delivered not ten minutes ago, and tries to reason why the fuck a mattress is making him want to crawl on top of his boyfriend and ride him into the - well, into the mattress.
Shouto had needed a new mattress. Katsuki abhorbed the hard as fuck springboard that Shouto used to call a bed. He had suffered through an entire year of four day a week sleepovers that, without fail, left him with neck pain upon waking up.
Shouto, unsurprisingly, had no trouble sleeping thanks to his uncanny ability to fall asleep anywhere. Katsuki could recall hours of tossing and turning in which he would, at times, sit up and look disdainfully at Shouto’s sleep-peaceful face. In those moments, he’d imagine beating it in with a pillow until Shouto was wide awake and then insisting that he watch Katsuki suffer his way into a fitful sleep just so that they could both be exhausted in the morning.
The final straw came when Katsuki woke up with a crick in his neck so severe he’d had to call into work because he simply couldn’t turn his head to face forward. It was three days before he could freely move his neck and each of those days Shouto would come over to Katsuki’s shared apartment and rub his neck. Kissing the tight muscles and asking, “Do you feel better today, Kat?”
It wasn’t as though sleeping at Katsuki’s breadbox of an apartment had been much better. At the time, his room was little more than a place to sleep and just big enough for a twin size bed. Which was fine when Shouto wasn’t over. But when he was Katsuki would, again, spend his night tossing and turning. The energy put forth in trying to figure out how he was supposed to even fit on the mattress with Shouto’s long legs, bent at the knee, taking up more than half of the available space left him irritable and exhausted come morning.
“We can’t keep doing this,” he said one night. He’d been staring angrily at his ceiling, arms crossed and mouth set in a vicious scowl
Shouto had been dead asleep but still managed to respond with a small grunt that prompted Katsuki to continue his rant. One of the other uncanny sleep abilities Shouto had was, somehow, always being able to respond to Katsuki. He could sleep through a fucking car alarm, but if Katsuki said anything he’d wake up just enough to engage in conversation.
“There’s no room here and it’s not even the fucking bed that’s the main issue. Fucking me, pink cheeks and Deku are practically tripping over each other as it is. And I am not spending another fucking night on your God forsaken mattress.” He threw his hands in the air, completely exasperated by the situation. “I don’t care how nice your kitchen is, I’m not doing it.”
“Nnn,” Shouto offered in comfort.
“I don’t know how we’re ever supposed to fucking live together if I can’t sleep when we’re in the same bed.”
Shouto’s response was immediate, “Then we’ll buy a new one.”
“ What ?” Katsuki turned and found that Shouto was wide awake now, eyes a little dreamy but engaged.
“You’ll move in and we’ll buy a new mattress.”
Katsuki felt his heart thumping against his chest, blood pressure rising as his face flushed pink. “I-I,” he stumbled over his words just trying to get his thoughts in order. “I’m not moving in , what the fuck are you talking about!”
Shouto sighed and brought himself to his forearms, “Of course you are.”
“You don’t just get to decide that on your own, fucker!”
“Shh, you’ll wake up Izuku and Ochako.” Shouto spoke softly, as though Katsuki was a child who needed to be reminded to use his inside voice. The worst part was that it worked.
Katsuki had deflated, crossed his arms tighter and narrowed his eyes at his boyfriend. Shouto smiled back at with a small, upward pull of his mouth. Katsuki’s favorite kind of smile. One that was just for him. One that made Shouto’s eyes sparkle as though he thought that Katsuki had hung the stars. “You’re talking out your ass,” he muttered fractiously.
“Baby,” Shouto started. He only ever called Katsuki baby when Shouto wanted him to turn to putty in his hands, and without fail Katsuki always did. “I love you, and you love me.”
He watched red and white strands fall into Shouto’s line of sight, and the absolute dumbass started trying to huff the strands out of his face instead of using his goddamn hands. Katsuki sunk further into the mattress, completely enamored by how stupid Shouto looked trying to blow his hair away.
Shouto did succeed after a moment and turned his focus back to Katsuki. “You do love me, right?”
Katsuki looked down the length of his body with an embarrassed frown, “Yeah, so. What of it?”
“We’ve been dating over a year.”
“Fourteen months,” Katsuki mumbled as though that was an argument against what Shouto had said.
“You hate my bed, but still come to stay the night more than half the week.”
“Yeah, well, like I said, I like your kitchen and this apartment is fucking small.”
“Small, and inexpensive. You’ve said before that Ochako and Izuku could afford it without you.”
“Just, like, theoretically,” Katsuki gestured vaguely in the air.
Shouto hummed with a lilt of humor and they lapsed into silence.
After taking a moment to collect himself, Katsuki turned his head to meet Shouto’s eyes. They blinked at him slowly, like a cat who felt safe and loved.
Shouto wrapped an arm around Katsuki’s hip and pulled him closer. “Move in with me, baby.”
Katsuki uncrossed his arms and settled into Shouto’s embrace. “Why should I move in with a dumbass like you?” Katsuki asked as though he hadn’t already made up his mind.
Shouto kissed the crown of his head then and responded simply, already half way back to sleep, “Because I’ll make you happy, Katsuki.”
He’d felt his heart skip a beat and his throat momentarily tighten around a lump in his throat that was made of too many complex emotions for him to process. So he swallowed them down and agreed to a journey he’d never taken with another person
That had been two weeks ago and now - well, now he’s in a staring contest with their new mattress. Shouto comes back into the room with a fresh set of sheets, “Are these the ones you wanted?”
Katsuki tears his eyes from the bed and glances at the sheets in Shouto’s hands. They’d picked out two sets on Amazon last week and his boyfriend, who he lives with, has picked the ones Katsuki chose. He frowns when his stupid heart clenches for no fucking reason. “Yeah,” he responds flatly then turns to walk out of the room. “Put the mattress protector on first, though.”
“Where are you going?”
He says the first thing that comes to mind, “Gotta call my mom.” He steps out onto Shouto’s porch. Our porch , he reminds himself and it makes his stomach swoop. True to his word, he calls his mom that way he can at least say he wasn’t lying about what he was doing.
She answers teasingly, “Oh, look who’s finally calling their mother. It’s only been three days, brat.” That launches them into an easy back and forth of vaguely hostile banter that makes him grin viciously. Eventually their exchange calms and his mom says, “So you moved in with your boyfriend.”
“I guess.” He pauses and leans on the railing. “We bought a mattress.”
“Really?” She draws out the word. “That’s quite the investment, supposed to last eight years.”
Katsuki clears his throat, “Bought the mattress protector too, supposed to make it last longer.”
His mom hums. “That’s a long time, Kit-Kat.”
“Yeah, well. Whatever.”
His mom sighs a little dreamily, “We’re happy for you Katsuki.”
He swallows the strange feelings sitting at the base of his throat. “Thanks.” He checks his phone and sees he’s been talking with his mom for nearly ten minutes. “Hey, mom. I gotta go make sure this fucker made the bed right. I’ll talk to you later.”
“Okay, love ya’, Kat.”
“Yeah, love ya’, too.”
Katsuki goes back inside and finds that their bed sheets are laid out perfectly, he’s not even surprised it’s been ten minutes and all Shouto’s managed to do is put the sheets on. He can so clearly imagine him trying to make sure the fitted sheet was secure enough to stay put during the night and that the corners were folded just how Katsuki likes them.
Shouto stands at the end of the mattress, smoothing out the center of the sheets for a crisp finish. He turns bodily to face Katsuki when he enters the room. “Hey, how’s your mom?”
It’s overwhelming how so much emotion floods into his chest when their eyes meet. Katsuki isn’t meant to feel this much emotion all at once. He’s the kind of person that feels deeply but singularly in that he can only process one feeling at a time. But right now everything is knotted together like a string of which he no longer knows where the end or the beginning lies. Even if he did he would pull those ends with all his strength, make the knots tighter. Tight enough to last a lifetime and then some.
Katsuki strides forward, grabs Shouto by the front of his shirt and watches how Shouto’s face morphs into a loving question within its own right. “What’s wrong?” He asks, staring down into red irises that are emblazoned with passion
“Nothing.” Katsuki pushes onto his toes, reaching up to kiss Shouto with what feels like limitless desperation. He’s able to throw his arms around Shouto’s neck when his hands slide under the hem of Katsuki’s shirt, come to rest on his hips, and ease him down back onto his feet.
“Kat,” Shouto tries to speak between kisses but Katsuki just pulls him in closer. Slots their mouths together perfectly. Pulls at Shouto’s lip and licks lightly across the roof of his mouth to shut him up because what he wants to say is something he doesn’t know how to express with words. He wants for Shouto to understand, to be engulfed by the feelings that are raging inside him. Katsuki pitches his body forward and they fall back into their bed, bodies flush atop each other.
This time when Shouto speaks he puts both hands on Katsuki’s cheeks as his eyes study his face. “Baby, are you sure nothing is wrong?”
Katsuki turns his head and kisses the inside of Shouto’s palm. “I just want you to fuck me, Shou.” He touches his lips to Shouto’s, not so much a kiss as it is a whisper of love. “C’mon, baby. Make me happy.”
Shouto flips them over and stares down at Katsuki. His hand pushes Katsuki’s fringe away from his face. “You hate nicknames, they embarrass you.”
With a frown that doesn’t quite express as much irritation as he would like, “Yeah, well. Maybe I want to be embarrassing tonight, got a problem with that?”
“No,” Shouto smiles all too contently and nuzzles against Katsuki’s jaw. “Not at all.”
They kiss and Katsuki takes control easily, makes it slow and lazy as Shouto’s hands travel his body. There is no exploration, he has long since known every part of Katsuki that makes him weak. Spent months learning, and teaching. Before Shouto Katsuki had never been tongued open before, never been filled up with hot cum, edged to the point where pleasure becomes pain. Never lived with someone, never wanted to be close to someone, never knew love like this. Love that is made of such deep devotion, endless joy, and blissful fear.
And there it is, the most complicated of the things Shouto makes him feel: fear.
Fear that he could fuck it up. Fear that Shouto might realize he’s too considerate a person, too thoughtful and thoughtless all at once, too gorgeous, too fucking deserving of happiness to settle for someone as volatile as Katsuki could be.
But he is settling for Katsuki.
They bought a mattress together. A stupid queen size mattress with a high density foam base, coil supports under three layers of gel-infused foam; the combination of which makes it a hybrid. And they picked a hybrid because it’s the best option for couples. They even went with the luxury model, so if they take care of it the damn thing could last up to twelve years. They could sleep on this fucking mattress for over a decade together and - oh god . Katsuki is so in love with him, so much so that he doesn’t know what to do with it.
Katsuki clings to Shouto, clothes peeled off of him with care leaving him naked and panting as Shouto works him open. Katsuki can’t keep up with their kiss, so lost in his own feelings that all he can do is breathe shallowly as Shouto moves his mouth against his.
Then he hiccups, so overcome by everything he’s feeling that it’s starting to break free. Shouto’s fingers still inside him, and the loss of movement makes Katsuki open his stinging eyes. “Don’t stop,” his voice threatens to crack.
Shouto stares down at him with wide eyes. “You’re crying.”
“I am not,” Katsuki doesn’t sniffle and Shouto definitely doesn’t wipe away the tears in his lashes.
“Kat, you’ve been acting strange since this morning.”
Katsuki rolls his lips together in a scowl. He refuses to speak because he doesn’t know what the fuck he’ll say.
Shouto thumbs Katsuki’s bottom lip out from between his teeth and kisses his wet lashes. “Baby, please. Tell me what’s wrong,” he soothes and Katsuki involuntarily lets out a shaky breath.
“It’s the stupid fucking mattress!” Katsuki tries to sound anything other than vulnerable and misses by miles.
Shouto tilts his head, “Do you not like it? There’s a thirty-day money back guarantee, we can just get another one.”
“No, you idiot!” Katsuki swallows. “I love the fucking mattress. It’s so fucking comfortable, and it’s got the cooling beads so you don’t sweat all fucking night and the moderate support so my goddamn neck doesn’t hurt in the morning.”
Shouto frowns questioningly at him, “I don’t understand. If you love the mattress, why are you crying?”
He avoids eye contact by looking anywhere other than Shouto’s face. “Because we bought it-” Katsuki’s voice cracks then he tries to continue. “We bought it together. And-” he has to blink back tears, fucking tears as he lets lets out a trembling breath, “-we won’t have to replace it for at least ten years.”
Their eyes meet again and Shouto is grinning down at him. Katsuki covers his face. “Jesus, don’t look at me, this is fucking pathetic. Oh my god.”
Shouto pries Katsuki’s arm from his face. “I get it now. I’m excited to start our life together, too, Kat.”
His words pierce through Katsuki’s heart and he tries in vain to bite back a single broken sob. He hides this failure by pulling Shouto in by his face and kissing him until he can’t breathe. His tears flow freely in the same way his thoughts do. “I love you, Shou. I don’t say it enough, but I do. I love you so fucking much, baby.”
“Katsuki, you might not say it, but you tell me you love me everyday.”
With a quiet voice, “What if I fuck this up, Shou? What the fuck am I going to do if you leave me?” His own words sound foreign, never in his life has Katsuki been so absolutely terrified by the idea of failure. Never had it been a thought in his mind that he wouldn’t succeed at everything he tried whether it be work, hobbies, or general life but it wasn’t up to him alone whether or not they would succeed as a couple. For the first time he is putting his success, his happiness, his heart in the hands of somebody else and hoping they would love him through the end of time. And, looking into Shouto’s eyes, Katsuki knows that he is it for him, if he can't have Shouto, he doesn't want anybody.
“Hey,” Shouto says calmly, knuckles running along Katsuki’s jaw. “Just breathe. I’m here. You’re not going to fuck it up, I’m not going anywhere.”
Katsuki swallows the lump in his throat. “You can do better, you know.”
“I can’t, though. You’re the Katsuki Bakugou. Even if I could do better, I wouldn’t want to.” He pecks Katsuki on the lips. “Katsuki, you could never know how much I love you.”
Katsuki searches his face and sees only unwavering honesty. He pulls Shouto flush to his chest and just holds him. “We’re really doing this,” he whispers.
“Yeah,” Shouto breathes hot against his ear. “At least for the next ten years.”
The both of them laugh into each other’s necks and when they quiet down Shouto broaches the topic, “Do you still want to-”
Shouto doesn’t even get to finish the question before Katsuki is prying his mouth open with his tongue, kissing him deep and sensual. “Just love on me, Shouto.”
His legs wrap around Shouto’s hips begging for them to be closer, for them to be one. When Shouto pushes inside of him, Katsuki rolls his hips to meet each of his thrusts. They breathe heavily into one another’s mouths, whispering sweet nothings and promises as they find the edge of their combined pleasure.
“Kat, I’m going to-”
Katsuki nods against Shouto’s shoulder, “Me too.” His legs tighten around Shouto’s hips. “Just keep going. Want you just like this.”
Shouto’s hand starts to jerk off Katsuki’s neglected cock as his hips snap forward more determinedly. Katsuki finishes first, cum landing in thick ribbons over Shouto’s knuckles and across his stomach. His ass clenches down rhythmically over Shouto’s cock, milking his orgasm from him greedily, loving every ounce of himself that Shouto leaves behind when he pulls out.
They tangle themselves together after. Shouto draws circles on his back with featherlight touches of his fingertips that have Katsuki relaxing into the mattress wishing they could fall asleep like this. Then Shouto has to ruin it, “Do you always cry when you feel too many emotions?”
“If you ever bring that shit up again, I’ll bite your fucking dick off.”
Shouto hums, “Of all the threats you’ve ever made, that’s the least terrifying one so far.”
“Oh, yeah?” Katsuki peeks a menacing eye open.
“Well, your threats are usually more realistic.”
“Okay, well how about this then, fucker: if you ever bring what happened up again I’ll make you sleep on the couch for a fucking week.”
“Good thing I can sleep anywhere.”
Katsuki snorts. “I can’t believe I love you.”
“It really does seem ill-advised. If it weren’t for you all my laundry would still live on top of the dryer. I can’t cook. I can’t even take care of a goldfish.”
Katsuki props himself up just enough to look at Shouto’s face, “When the fuck did you have a goldfish?”
“It was the class goldfish in the fourth grade, very traumatic. I don’t like to discuss it.”
“You’re a fucking adult, I’m sure you could take care of one now.”
“I thought so too about three years ago, but...” Shouto trails off.
“You’re hopeless,” Katsuki drops his head back to Shouto’s chest.
Shouto kisses the top of his head. “Not so much anymore.”
Katsuki settles deeper into Shouto’s arms. “I mean it, Shouto. This mattress better fucking last.”
“It will.”
They lapse into silence, outside their window the sun is setting and everything feels perfect until Katsuki looks to the corner of the room where their laundry chair is and sees an unopened box. “You didn’t put the fucking mattress protector on!” Katsuki slaps Shouto’s chest and gets himself up off their bed.
“I’m sorry,” Shouto blinks at him vacantly, not looking at all sorry.
“It’s going to be covered in all our fucking sex sweat now you dumbass! We just bought this,” Katsuki groans then walks off to the bathroom. “I’m taking a shower. You can change the fucking sheets and, this time , don’t forget the mattress protector.”
“But Kat,” Shouto whines, “I just made the bed.”
“Welcome to the rest of your fucking life, baby. Don’t regret it.”
That night, under the weight of their comforter, beneath their soft sheets, Katsuki lets himself be gathered up into Shouto’s arms, and falls into a peaceful sleep.