Chapter Text
The headboard creaks as the ropes strain against it. Katsuki's wrists ache from how hard he's been pulling but he makes no move to safeword. They've been at this for hours it feels like, but for all he knows it could have just been 10 minutes. Denki shifts on his lap, brushing against his aching cock, as he steadies himself with one hand on Katsuki's chest. From this angle, he can't see much, but he knows that Denki is fucking himself with his fingers.
Den—Denki, c'mon," he urges, not begging. Begging is what Denki wants and there's no way he's giving him the satisfaction. Katsuki can hear the slick sounds of his fingers and he pulls at the ropes tying his hands above his head. He just needs to touch him. He knows that once he gets his hands on Denki, he'll be like putty in his hands.
Denki hums as he smirks down at him. "Funny, isn't it?" Katsuki nearly growls in response. "So big and bad any other time but look at you now. All tied up at my mercy." Katsuki chokes down a whine.
"Denki, just fucking—" His mouth snaps shut as Denki pulls out his fingers with a wet sound. He settles both hands on Katsuki's chest, idling toying with his nipples, as he lines his ass up to Katsuki's cock. He can feel himself dripping and tries to look down at where their bodies are touching.
"Katsuki." His eyes snap up to him. "Beg." Katsuki opens his mouth to protest but all that comes out is a choked moan as Denki slowly grinds against him.
"Denki, come on! Just sit on my fucking cock!" he all but screams but Denki just giggles in response.
"Beg," he purrs with another filthy roll of his hips. "Sound so pretty when you do." Katsuki's face flames. He feels like he's seconds from coming but there's no way that he's going to cum anywhere except inside of Denki. He tries to thrust his hips up but Denki quickly moves away with a grin. "Beg."
"God, fuck, shit." Katsuki has the sudden urge to kick his feet like a toddler. "Fucking fine!" Denki smirks and tilts head, waiting. "Please, Denki," he grits out. Denki giggles and moves further away from Katsuki.
"You can do better than that, Kat. Don't you wanna fuck me?" Katsuki forces a sneer on his face.
"What? You want me to cry or something?" Denki laughs.
"Sure, it would be crazy hot." Katsuki huffs as he pulls on the ropes again and Denki's face goes serious. "If you don't start begging I'm grabbing my dildo and fucking myself while you watch."
"No!" Katsuki finds himself shouting before he can stop himself and bites his lip. God, he was joking before but he just might actually cry before he gets to fuck Denki. "Den, please… God, please, lemme fuck you." He blinks past the tears and sees Denki grinning at him again.
"Good boy." Then all at once, he sinks down onto Katsuku's cock. Katsuki yells out and throws his head back at the sudden heat. Above him, he hears a half-hysterical giggle.
"Denki, untie me, please," Katsuki begs, completely abandoning his previous hesitations. Denki smirks as he lifts up slowly.
"Hm, but you look so good like this. Would you ever let me take a picture?" Katsuki starts to protest but all but screams when Denki slams back down. He reaches up and wipes away the tears streaming down Katsuki's cheeks. "Cute when you cry, Katsuki. I should do this more often."
His whole body feels like a live wire as Denki finally starts bouncing on his cock. The sounds he makes only drives Katsuki closer and closer to the edge. He clenches his fists so tightly that his nails dig into his palms.
"Denki, 'm gonna cum," he whines. The smirk on Denki's face immediately has the hair on Katsuki body standing up. He can feel the heat building in his gut until it's just about to snap and then—
Katsuki sobs as Denki pulls off at the last minute, causing his cock to just dribble cum onto his stomach. Fat tears pour down his cheeks as he reels from his ruined orgasm. Denki coos at him before slipping his dick back inside. Katsuki shouts at the tightness around his sensitive cock.
"God, this is a power trip. No wonder you like to take charge." Katsuki can just barely see his manic smile past the tears.
"Can't, I can't—"
"Sure you can, Katsuki," Denki says with a slight head tilt. "You wanna cum inside of me don't you?" Katsuki nods vehemently and Denki finally starts moving again. It hurts, but it hurts in the way that it does after a really intense workout. He can feel Denki's walls fluttering around him and he wants nothing more than to feel him cum.
To his horror, he can feel himself getting close all too quickly. His cock aches and his wrists burn but Denki just keeps bouncing. His face is pleasantly flushed and Katsuki can tell that he's almost there, too.
"Denki, Denki, please. I can't. I'm gonna—"
"Little more, Kat," Denki moans out. "I'm close, so fucking close. You have no idea how hot you look right now." His nails dig into Katsuki's nipples as he cums with a shout. Katsuki bends his knees and fucks up into Denki, desperately chasing his own orgasm. Denki leans forward, panting in his ear. "Cum for me, Katsuki."
Katsuki cums so hard he's almost sure he blacks out for a moment. When he comes to, Denki had already untied him and is tending to the rope marks on his wrists. He blinks up at him groggily.
"Not as bad as I thought they'd be," he mumbles, his tongue not quite working yet. Denki scoffs and gives him a half-hearted glare.
"Speak for yourself. My thighs are fucking killing me." Denki continues grumbling as he tends to Katsuki. He was to reply, but his eyelids are so heavy that he has no choice but to close them. He's sure he can think of a proper comeback when he wakes up.