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It was so goddamn fucking late. Katsuki should have been in bed six hours ago–but no, being the best hero on the streets meant he didn’t get to keep a regular nine to five. It meant he had to be where he was needed the most, even if where he wanted to be was in his own fucking bed.
Katsuki scowled his way up the steps to his place. He didn’t even have the energy to do his full nightly skin care routine; all he had in him was the quick rinse off in the agency showers. The promise of his warm bed being the only thing keeping him upright as he silently kicked the door closed.
The whole apartment was dark, silent. Only streams of silver moonlight illuminated the vague shapes of their living room. It was so late in the goddamn night that even his insomniac husband was in bed. Not a muttering nerd in sight.
Kicking his boots off and dropping his bag by the door (he’d put them away, later), Katsuki trudged over to the bedroom.
Izuku looked so soft in the night, cocooned in too many blankets and curled around Katsuki’s pillow like it could be a suitable fucking substitution for the real thing. Idiot.
A cute idiot, though. With the way he nuzzled his face deeper into Katsuki’s pillow like he wanted to catch a scent of him, nose scrunching like a bunny, hips wriggling against the sheets.
Katsuki flexed his hands, resisted the violent urge to squeeze his husband, and instead made his way to the bed, leaving a trail of his clothes behind. (Later, he’ll get to them later. Right now he has a nerd to touch.)
Izuku was so soft and warm, wearing one of Katsuki’s old shirts–so big on him, because no matter how stacked Izuku was, Katsuki was just bigger, broader in the shoulders, taller, a massive wolf hovering over top of a fuzzy rabbit. The shirt Izuku wore (black, faded skull on the chest, stretched to all hell) ended just over the swell of his freckled ass, bearing the fading bruises of Katsuki’s spit-fire touch. He should refresh those marks, burn himself into Izuku’s bones, catch him between his teeth and gnaw.
But Katsuki was so damn tired.
He’s halfway to collapsing onto the bed, ready to spread like a weighted blanket over his husband when something catches his eye. Izuku shifted in his sleep, legs rubbing together. There, between his thighs, his skin glistened with wet. He tracked it to its source; fat pussy lips with a trail of slick leading from one hole and up to another puckered rim. Izuku must have been desperate, waiting for Katsuki to come home to find him playing with himself, getting himself ready.
Katsuki’s cock throbbed.
His exhaustion leaked from him and was replaced with a (fond) desperation of his own. His husband, fingers buried in his holes, crying out for his Kacchan? Poor baby must have gone to bed disappointed.
And that just wouldn’t fucking fly, not in his house.
Katsuki slid onto his knees at the bedside, palming a cheek and revealing Izuku’s well-lubed and used ass. He buried his face and licked a broad stripe between fuzzy lips and up until he could suckle at Izuku’s hole. Katsuki’s eyes fluttered shut as he feasted, feeling Izuku’s minute twitches at the sensation.
He flicked his gaze around the bedroom until he found what he’d been looking for. There, in the open bedside drawer, sat the cleaned vibe Izuku favored whenever he wanted to play with himself before Katsuki could get his hands on him. He always reached for the orange toy (just a shade too dark to be Dynamight colored) when he wanted Katsuki to watch him fuck himself open, not letting them touch each other until they were ready to burst.
(Besides, when that toy was glistening in Izuku’s pussy juices, the color was close enough to make Katsuki’s possessive little lizard brain go wild.)
Without detaching his mouth from Izuku’s ass, Katsuki swiped the vibe from its resting spot and rubbed it between Izuku’s folds, slicking it. Who needed lube when Katsuki’s baby was just so wet for him?
Izuku shuffled and moaned in his sleep, legs spreading on instinct for Katsuki.
“Good boy,” Katsuki purred into his hip, pressing a gentle bite there just to soothe that instinct to mark, to claim, to show the world that Izuku belonged to him .
Katsuki eased himself onto the bed, careful not to jostle Izuku too much. He didn’t need to wake Izuku for this.
Katsuki slid his fingers into Izuku’s warm cunt, scooping out just enough slick to coat his cock. While he stroked himself, staving off that feral hunger as much as he could, he slipped the vibe in just enough that the tip teased Izuku’s hole and flicked the power on. The low vibrations were drowned out by Katsuki’s pounding heart and Izuku’s sleep-soft groans. Hopefully Izuku wouldn’t wake up until Katsuki was balls deep, if he woke at all.
Just the thought of Izuku waking in the morning, holes aching and dripping in Kacchan, made Katsuki clutch tightly to the base of his cock. Even after all these years, Izuku had him feeling like he could burst with just one wayward glance like they were still horny teenagers figuring things out for the first time.
It’s not his fault his husband was a fucking snack.
Katsuki groaned as he pressed his cockhead to Izuku’s ass, so slick and wet and just barely stretched enough to accommodate him. He breathed deep, twisting the vibe so the vibrations would just miss Izuku’s sweet spot. He knew that the second he pressed against it, his husband would shoot upwards, the intense pleasure rocketing him towards orgasm.
Not yet, not yet… Katsuki wanted to play with him first.
Slowly, he sank into his husband, letting that hot cavern surround him in totality. Katsuki eased the vibe in and out in smooth, shallow thrusts. Izuku groaned, shifting, little gasps tumbling from his mouth as he stirred in his sleep.
Katsuki eased up, holding his breath. He wanted to tumble headfirst off the cliff that was Izuku, wanted to fall into him and feel his embrace all night long (however long they had left until dawn). Izuku settled eventually, sighing deeply. His hips raised instinctually, gently thrusting back onto Katsuki’s cock.
Fuck, Katsuki would drown in his ass if he could. Let those thick thighs crush his head. Screwing dying in battle, he’d rather die by his husband’s pussy.
His hips met Izuku’s ass with a decisive plap and Katsuki sighed. All the weariness thrust upon him by the world melted away. The vice grip around his cock soothed each of his aches and washed away his exhaustion. He felt at home, here in their bed, balls deep in Izuku. Fuck, he swore Izuku’s pussy had medicinal properties. Maybe it was just fucking Izuku, because he never felt better than when he was sinking as deep as he could into any of his husband’s holes.
Katsuki hadn’t stopped gently sliding the vibe around Izuku’s cunt. It made an obscenely wet schlick schlick schlick sound with every flick of his wrist. Izuku, in his sleep, groaned out a soft, “ Kacchan…” and Katsuki was gone.
He felt only the hot tightness around his cock squeeze, his free hand clenching around Izuku’s hip. Slick pussy juice slid down his fingers and turned his skin sticky. Katsuki took a deep breath in–inhaling all that was Izuku, from his favorite strawberry body wash to Katsuki’s stolen shampoo (can it even be stolen, if they’d been using the same brand for years, when Katsuki bought it for them, it was theirs, everything was theirs, shared, together, they couldn’t let go of the other, two bodies but one soul–).
Katsuki pulled back slowly, loving the way Izuku’s rim stretched to cling to him, begged to keep him inside.
He held his breath and then slammed forward. Both his cock and the vibe buried deep inside Izuku. He could feel the vibrations through the thin skin that separated Izuku’s caverns. Izuku tensed, took a sharp breath in, then Blackwhip shot out to wrap around Katsuki’s limbs.
It didn’t stop him, it encouraged him to fuck harder, deeper. Izuku, voice groggy and low with sleep, cried out.
Katsuki was murmuring into his skin, forehead pressed to his shoulder blades, mouth searing babbling nonsense as he pounded into his husband like an animal, filling his holes like Izuku so desperately wanted. He fucked and fucked hard , hips slapping into a squirting pussy. Izuku wailed, low and broken, as Katsuki stuffed him full. His moans and little oh oh ohs were music to Katsuki’s ears, each punched out breath in time with Katsuki’s pounding heart.
He was going blind but for the expanse of freckled skin under his nose, deaf but for Izuku’s sobs, senseless but for whatever Izuku provided him.
Everything, everything, everything. Izuku was his everything, buried deep in moonlight, hidden in shadows of night, but shining bright like his own star system, like a blazing sun that seared him from the inside out. Katsuki wasn’t anything except for Izuku’s Kacchan , now and forever.
Fuck all the extras; nothing and no one mattered as much as Izuku did. He didn’t want to be anything except whatever it was Izuku needed. And what Izuku needed right now was to cum one more time, cream himself on the vibe pumping out in a steady rhythm in time with Katsuki’s slamming hips. Katsuki needed to feel those velvety walls squeeze the life out of his cock.
Izuku’s scarred hand flew back to grip Katsuki’s wrist, crooked fingers clenching hard enough to leave bruises. He wailed a garbled scream, choking on his pleasure. Hot, sticky juice filled Katsuki’s palm as he crooked the vibe deep in Izuku’s cunt. Izuku’s entire body tensed and thrashed in the throes of orgasm, green lightning crackling in waves. He damn near broke Katsuki’s wrist in the process.
Well, wouldn’t be the first time.
Katsuki’s hips stuttered as Izuku’s ass tightened into a vice grip. But it was the quiet, “Kacchan–” mewled sleepily that sent Katsuki tumbling into his own orgasm, spilling his seed and grinding it deep.
He hissed through clenched teeth, coming down from the peak of pleasure with panting breaths. Katsuki slowly eased the vibe from Izuku’s pussy, clicking it off and dropping it on top of the shirt Katsuki had left on the floor earlier. He’ll clean it in the morning.
His exhaustion slammed into him all at once, twice as heavy after a thorough fucking. But the wild beast in his chest was satisfied, purring like a little cat now that he had his husband in his arms.
He tumbled to the side of the bed, dragging Izuku off the wet patches, making sure he could be as comfortable as possible. Katsuki pulled the covers up over their still entwined bodies.
“Hi Kacchan,” Izuku murmured sleepily, craning his neck to beg for a kiss. Katsuki indulged him, as always.
“Didn’t wanna wake ya,” Katsuki grumbled, nuzzling into Izuku’s neck and pressing a warm kiss just under his jaw. “Go back to sleep.”
“M’kay,” Izuku hummed, eyes still closed, face flushed pink and happy. “Y’can wake me if you want, next time.”
Katsuki smirked into Izuku’s soft skin. “You like this just as much.”
There have been nights when Katsuki woke to his husband riding him to hell and back, like the little horny devil he was.
Izuku giggled. “Yeah.”
“Dork.” Katsuki smothered the smug asshole with kisses all up his face. “Go back to fucking sleep.”
Izuku wriggled in his grasp and actually listened for once, snoring softly with the next breath. Katsuki sank into sleep soon after, but not before he murmured a quiet, “Missed you, ‘Zuku,” into freckled skin.
He was asleep when the reply came, but it didn’t matter. They were curled around each other, sated and warm, their worries pushed off to later , when all they needed right now was each other.