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Riot is a fucking menace, both in the streets and in the sheets, and although Katsuki will never admit it out loud…he fucking loves it. He loves it when the villain picks him apart piece by piece, pushes all of his buttons and makes him explode. Riot is a kinky fucker and Katsuki hasn’t regretted their secret relationship for even a moment…Honestly, Riot keeps him too “occupied” to think too deeply about it in the first place.
“Fuck yeah, babe, grind that ass back harder,” Riot murmurs against Katsuki’s ear from where they’re laying on their sides with Katsuki’s ass and back flush to Riot’s front. Katsuki groans at the long and thick shaft that ruts between his ass cheeks. Sleepily, Katsuki does as asked and presses his ass back hard over Riot’s leaking cock. A hardened hand grips his hip bruisingly and pulls him back even further, while Riot rolls his hips forward. Early morning light was just starting to peek through the curtains when Riot had started stroking Katsuki’s morning wood before he’d even awoken. Katsuki had blearily thrusted into that firm hold. Now, Katsuki groans as Riot teases his hole with his cock while his own aches and throbs.
The hand on his hip suddenly leaves briefly before Katsuki feels wet fingers prod against his entrance. He’s probably still prepared from last night’s activities, but you’ll never catch him complaining about more lube. Riot presses two in right of the bat and begins thrusting them past Katsuki’s soft rim.
“Fuck, babe, could probably just stick it in. This hole is still fucking loose,” Riot growls and twists his fingers to spread the lube against Katsuki’s walls. Katsuki moans at the stimulation as Riot presses a third and then a fourth finger in. “Should fist your ass more often, love it when your little asshole gapes. Gets me so fucking hard.”
Katsuki shivers. “You get hard if I even look at it,” he snarks breathlessly as Riot works those fingers inside him and spreads them wide. Images of last night float in front of him on loop. Riot had opened him up slowly, fucked his cum into him, and then fisted him until he orgasmed so many times that he practically passed out.
“You’re damn right I do…Have you looked in the mirror lately? Who doesn’t dream about having their own drooling little cockslut hero on their knees?” He purrs and nips at Katsuki’s neck. “Your little fucking hole swallows anything I shove inside.” He punctuates his statement by driving his hand hard and fast, curling his fingers to punch over Katsuki’s prostate. Katsuki squirms and cries out while his cock jerks and leaks between his legs.
“Fuck,” Katsuki grunts through panting breaths. “Fuckin’ put it in,” he gripes. He could cum from Riot’s fingers alone, but he wants that long thick rod filling his insides like now.
Riot chuckles and withdraws his fingers to replace them with his cock. He crams it in all at once and Katsuki lets out a yelp. “That’s right, little cumslut. You need my thick cock stretching your little hole wide, don’t you… Need me to fill that little belly with cum…”
Katsuki moans when Riot starts thrusting, his filthy words making Katsuki grab his own cock to start stroking it. However, when Riot changes the angle of his hips to press against Katsuki’s prostate a new feeling hits him and he releases his cock like a snake about to bite him.
“Fuck, Riot, pull out. Gotta take a piss,” he grumbles as he notices the aching in his bladder.
Riot stills behind him momentarily, but then grabs harshly around Katsuki’s middle and grinds his cock even deeper against that spot making Katsuki whine at the pressure. “C’mon, let me up, dumbass…” he grunts, but Riot’s arm doesn’t loosen its restrictive hold.
“Nah, little slut. I wanna watch,” the villain murmurs and bites down harshly over Katsuki’s shoulder. A yelp flies from Katsuki’s lips as the sharp teeth pierce the top layer of skin.
Katsuki wiggles and pushes against Riot’s arm. “I’m fuckin’ serious. You wanna watch so bad, then follow me. It’s weird as shit though…”
Riot relaxes his jaw and draws his teeth out of Katsuki’s reddened skin. “No, babe. I’m gonna fuck the piss right out of you, right here in my bed. Wanna watch you fucking spray cum and piss all over my fucking sheets…” he snarls and reaches down to grip Katsuki’s dick and starts stroking it while resuming his deep thrusts.
Katsuki moans, the pressure in his bladder increasing with Riot’s punishing pace. He’s never really thought about piss before in this context, but he’ll be damned if the image Riot paints isn’t doing something for him. “You sure?” he rasps. They’ve never talked about it and this is the first time it’s come up.
Riot leans up, “Fuck yeah, babe.” He licks over the shell of Katsuki’s ear and blows against it. “And when you’re all nice and empty, gonna fuck you full of cum and my own piss. Gonna fill you right the fuck back up.”
Fuck… Katsuki’s hips buck backwards and he clenches down at the lewd image. The pressure in his bladder increases and he can practically feel the sloshing inside him as Riot drills into him harder.
“Yeah, my nasty little cumslut likes that…tighten up that little hole, baby,” Riot purrs, hips slapping against Katsuki’s ass. His hand tightens around Katsuki’s cock, twisting around the head with every fucking stroke. Katsuki’s eyes practically roll at the conflicting pain pleasure sensations rolling through him. He’s always liked a little bit of pain, and apparently a full fucking bladder does it for him. He feels the pressure and tension building in his gut the harder Riot works him. His legs practically vibrate the closer he gets.
“C’mon little slut, let it go. Let me see you fucking spray,” Riot encourages, dropping his voice low.
“Fuck! Shit!” Katsuki cries out, riding the very edge of the orgasm he knows is going to blow his mind.
Riot’s hand flies faster over his cock, nearly strangling it in his grip while his cock fills the room with slick slapping noises as he rails Katsuki’s hole.
“Gonna–” Katsuki tries to warn, but the pressure in him bursts outwards making his whole body tense and his toes curl as a mixture of cum and piss suddenly sprays from his slit like a fountain. Riot continues to stroke him harshly, the arcs of golden and white covering the sheets in front of Katsuki, creating a puddle over the fabric. Katsuki’s scream echoes in the room.
“Such a good little slut, so fucking sexy,” Riot praises through a clenched jaw and releases Katsuki’s cock, only to grab his hip and hold him still while he pounds his hips in jerky motions. “Now, it’s my fucking turn.”
Katsuki grits his teeth as Riot suddenly stills and grinds his cock in deep. Scorching heat floods Katsuki’s insides and he grunts when it just keeps fucking going. He can even feel his belly bloating under the onslaught. Riot takes the opportunity to suddenly push down on Katsuki’s navel as he continues to piss. “That’s it, take it all, babe. Fuck…gonna fucking do this all the time,” Riot whispers harshly and circles his hips inside Katsuki’s guts making the liquid rock and splash around inside him.
“Jesus fuck, Riot…” Katsuki slurs, as the fullness just keeps increasing. He’s never felt like this as pure liquid heat pushes against his insides. It’s like a piss enema… He chuckles a little dopily. His thoughts are jerked back to the forefront, when Riot finally starts to pull out, but then thrusts back in viciously.
“See what you do to me…still so fucking hard for you,” Riot explains and starts thrusting slowly. Katsuki can feel a little bit of the liquid starting to drip out around Riot’s cock, steady rivulets running down his crack and over his cheeks.
Suddenly, Riot pushes against his side and Katsuki rolls to his stomach from the force. He grunts at the weight when Riot settles over the back of his thighs and uses his knees to press Katsuki’s thighs together. He feels the shift behind him and only has a moment to prepare before Riot’s cock is spearing straight down into him. “Fuck yeah, that tightened you right up. Gotta keep it all inside you while I fuck this piss deeper,” Riot growls and braces his hands over Katsuki’s hips as he fucks down into Katsuki with brutal strokes.
“Riot!” Katsuki screams as the pressure of all that piss and cum now presses deep into his bowels. Every time Riot drills down into him, he can feel the liquid moving inside, stroking his walls.
“Fucking scream my name, little hero. Nobody can hear you. You fucking love my piss inside. Say it!” Riot commands roughly.
Katsuki’s mind is a fuzzy mess as he tries to form the words.
“Tell me how much you love my cock splitting you open. How much you want my cum and piss,” Riot continues pummeling against Katsuki’s cheeks.
Katsuki groans and wiggles his hips. “Fucking love it. Give me more, Riot. Want all of your piss and cum filling me up. Fucking split me open, please,” Katsuki begs dutifully.
“Nasty little piss-slut… just a dumb little cumdrunk whore, aren’t you?”
Katsuki moans at the humiliating and degrading words. Fuck, it’s so goddamn hot. He quakes under Riot and feels himself building back up. “Yessss…” he hisses.
“Are you gonna cum again? Can feel your little hole spasming…” Riot snarls. He suddenly shifts off of Katsuki’s legs and lifts his hips until Katsuki is forced to shift his knees under himself. “Keep your fucking head down and spread those fucking knees,” he orders roughly. Katsuki spreads his knees wide apart while keeping his chest plastered to the mattress. Riot grabs Katsuki’s hips and resumes his merciless thrusts. Like this, he pegs Katsuki’s prostate, making him jolt and shake. “Just a dirty fucking animal. A breeding bitch getting mounted,” Riot sneers.
Katsuki’s legs tremor as the pressure mounts in his abdomen. He pushes his face to the side. “G-gonna c-cum again,” he stammers, voice hoarse and scratchy, breaths harsh and frantic.
“Mmmmmm yeah, cum on my cock, slut,” Riot encourages and bucks his hips faster against Katsuki. The words send Katsuki over the edge and his whole body convulses as more cum trickles from his tip to join the mess on the sheets below.
“Good fucking boy, gonna feed you another load. Might plug it inside you so that I can fuck it all out of you again later,” Riot threatens, but Katsuki can hardly hear past the blood rushing in his ears as Riot continues to pound him into oversensitivity. His thrusts become erratic, short and sharp and Katsuki clenches down.
“So fucking tight…” Riot grunts. “God, yeah.” Riot presses in deep, past Katsuki’s muscles. There’s so much piss and cum already inside him, that Katsuki barely registers that more is being added. When Riot pulls his softening cock out, Katsuki shivers at the sudden absence. “Stay right there,” Riot instructs. Katsuki can’t help but think that he couldn’t move even if he wanted to. His muscles feel exhausted and frozen as he floats in hazy half-coherent thoughts. He jerks when something thick is suddenly shoved past his rim and settles heavily inside him. “There, all plugged up. Gonna keep all that piss and cum warm for me, aren’t you, little cumdump?” He murmurs and strokes over Katsuki’s hair lightly, before manhandling Katsuki back onto his side until they’re spooned back into the same position they started in.
Katsuki hums tiredly and presses back against his boyfriend, letting the sloshing liquid and pressure inside him settle. A pressure rubbing against his belly has him grunting.
“So fucking sexy, babe. I just wanna keep fucking more into you,” Riot mutters and drops soft kisses down Katsuki’s neck. “Wanna watch your belly bloat with how much I breed and piss into that tight little hole.” He presses down hard. “Fuck, can feel it moving inside you.”
Riot’s hand then travels downwards over Katsuki’s navel and grabs his dick. “Look at you, already hard and begging for more like a little whore. Give me a few minutes, babe and I’ll be ready to fuck some more into you. In fact, I think that’s how we’ll spend the whole day…” he rambles against Katsuki’s neck even as Katsuki’s eyes begin to drift closed against his will.
“Gonna keep filling you with cum and piss until you’re begging me to stop,” Riot whispers, just as Katsuki’s eyes slam shut, too heavy to hold up anymore.
“Later,” he hears himself slur out quietly in response.