Chapter Text
Izuku was strapped to a machine unlike anything Katsuki had seen before. There was a bench attached to a pole, and Izuku sat on that bench, hugging that pole. Katsuki couldn’t see it, but he knew that there was a fleshlight on Izuku’s dick, the pole it was hidden within pistoning it back and forth with its inner mechanisms. His face was strapped directly against the pole, a dildo being thrusted likewise in his mouth. They were equal but opposite forces.
Katsuki doubted that Izuku knew he was in here — he was blindfolded, and the sounds of his moans masked the slight creak of the door. He looked pointedly at Chisaki, who sat with a disinterested air in a chair off to the side.
Katsuki never liked Chisaki. He especially hated that he would need that man’s permission to do this, but that was the way things were.
Chisaki nodded.
Katsuki undid his jeans as he walked over to Izuku. However, before he could sit down, Chisaki spoke.
“Take them off completely.”
Katsuki clenched his fist, but did as he was told, including his underwear and shirt. He knew Chisaki meant those as well.
He sat down behind Izuku on the bench, only slightly sinking into the firm padding. This close, he could see the way Izuku thrusted his hips into the movements of the fleshlight. The plug in his ass was also painfully obvious, and seeing it made Katsuki want to rip it out and shove himself in.
Hands gripped his shoulders. “I used him before you came in here. Don’t take out that plug unless you want my sloppy, cum-filled seconds.”
Katsuki swallowed, his half-hard shaft starting to fill out completely. He hated Chisaki, but damn, he loved imagining that.
“But if you fuck him hard enough, I’ll take the cock ring off of him.”
Katsuki’s eyes widened and he peeked around Izuku. Sure enough, it was there: a metal cock ring wrapped snugly around his shaft and balls. Hadn’t he been in here for hours? Had he not been able to cum that entire time?
“I think he deserves to cum, don’t you?”
Katsuki nodded and gripped the base of the butt plug, slowly pulling it out. Sticky white liquid leaked out onto the bench.
Katsuki, now fully hard, lined himself up with the now-empty asshole. He slid in, savoring the feeling of those velvety walls. Despite how rude to him he had often been when he was younger, he’d always had a soft spot for his Deku. He loved the muffled moan Izuku made when he bottomed out. Now that he was fully in, Katsuki put his own ass back down on the bench and let himself enjoy the feeling of just being in Izuku. The semen made a little squelching noise.
Chisaki squeezed his shoulders. “You have to wait for my permission,” he whispered, and then his hands disappeared. “Do not turn around.”
Katsuki huffed, but nodded, despite knowing that Chisaki probably hadn’t waited for him to. Izuku whimpered, rocking his hips harder, and it took every modicum of Katsuki’s self-control not to pound into him.
After an agonizing long minute, Chisaki came back. “If you’re going to fuck my property, you’re going to do it by my rules. I get control. Do you accept these conditions?”
“Yes,” Katsuki rasped. Izuku’s limited movements only served to tease him. He needed more!
“Open your mouth.”
Katsuki swallowed his doubt and obeyed. Something large and round — a ball gag — was shoved in and fastened around his head. Next Chisaki moved to the side and strapped thigh cuffs onto... Izuku?
He barely had any time to be confused before Chisaki grabbed his wrist and secured the other cuff there. Oh. Chisaki did the same the other side, forcing Katsuki to lean his chest against Izuku’s back. He would’ve much preferred to be able to grab Izuku’s hips, but he also would’ve wanted to be able to suck on his neck. Not his rules.
The last surprise came very suddenly. Something was shoved up his asshole, and Chisaki wasn’t gentle about it. The hole burned in protest, but Katsuki could do absolutely nothing, not even when it started vibrating. He whined in protest.
Chisaki smacked his ass. “I told you, my rules. Don’t move yet.”
Katsuki didn’t just want to move, he wanted to tie down Chisaki, too. He should’ve known this was a mistake. But also knew that if he started fucking Izuku before Chisaki said to, it would get much worse.
Chisaki disappeared from his sight again. Katsuki flinched when he heard the chair scrape against the floor. When Chisaki had moved it to the left of Katsuki, close enough to get a good view of the action, he sat down in it and pulled out his own dick. He looked Katsuki in the eyes as he lubed himself up, taking his time. When he was satisfied, he nodded. “Begin.”
Katsuki pulled out all the way and pounded back in hard. Izuku shouted, clearly surprised. He kept going, in and out and in and out, fucking Izuku at a fast pace. To hell with slow. He’d already waited long enough.
Katsuki gripped Izuku’s thighs, knowing that he would leave bruises. He could hear Chisaki pumping himself off to the side, but that only fueled him to pound Izuku harder. He wanted to give him a better fuck than Chisaki had.
He was getting close. It hadn’t been that long, but he didn’t care. With one final thrust, he spilled his hot load inside Izuku. He bit down hard on the gag, penis twitching. When he finished, he let himself rest on Izuku’s back. The vibrator still buzzed inside his own ass. He moaned, wanting Chisaki to take it out.
“Oh, that was it? You’re already done?”
“Mmmf!”
Chisaki chuckled. “No, no, that wasn’t enough. When you’re hard again, do it again. I’m not taking anything off until I’m satisfied.”
Katsuki yelled and tugged on the cuffs. Izuku squirmed in front of him, making little noises. He probably wanted his ass-fucking to continue.
Chisaki gave a fake little yawn. “Well, if you’re not feeling up to it, I’ll just come back later. If you change your mind, wait ‘til I return.” He tucked himself back in his pants.
Katsuki’s eye widened and he shook his head, but Chisaki ignored him. He left, and the lock clicked behind him, sealing them to their fate.