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He lets Beam open his legs, spread them wide as he noses Denji’s cock, trailing down further towards the cleft of his ass. He drags a hand down the other’s thigh, between his cheeks, and Denji’s breath skips, has to swallow on purpose to calm down.
Beam pauses to warm up some lube in between his fingers, then slowly, agonizingly, he inserts a finger in, breaching bit by bit. He lets it settle in, Denji’s asshole fluttering around it before adding a second one, then a third. When Beam leisurely pulls them out, teasing, Denji can’t help but jolt his hips at the loss, clenching at nothing.
Beam straightens to give Denji a kiss while he grabs the bottle of lube again and slathers his dick with it. Denji can feel him line himself up, the head just pressing against the rim. He’s about to ask Beam if it’ll fit when he pushes in, all of the sudden there. Here.
Denji gasps out, a high keen in his throat. Beam seems to take that as a sign of approval, and he slides in until he’s buried all the way inside him. Then Beam moves and all thought leaves Denji’s brain, goes straight to his dick.
“Lord Chainsaw,” Beam groans in his ear, but Denji can barely hear him, his ears ringing. He registers the feeling of something wet fall onto his stomach just before Beam thrusts forward again, and Denji’s legs tremble all the way to his toes, heartbeat fluttering dangerously.
“Fuck,” he pants out, and Beam whimpers when Denji clenches around his cock, dropping his head against the other’s chest.
Beam is babbling nonsense in his ear, sweet nothings mixed in with horrifyingly visceral declarations of how good it feels to be inside Denji.
Denji rolls his hips in response, letting Beam rut into him. He watches Beam’s cock with morbid curiosity or maybe awe as he slides out, thighs shuddering when he slams back in. He untangles his hands from where they’re twisted in the gaudy red sheets of the hotel bed and pulls Beam down to kiss him, their tongues writhing against each other. Beam licks his teeth, then hikes Denji’s leg up, finding a new angle to wreck him with.
He can tell Beam’s close now, his breath hitching in Denji’s mouth. Beam drops his head into the crook of his shoulder, nose pressing against his collarbone. His tongue flicks out, then he bites down, leaving a red ring on Denji’s neck as he comes. Denji follows not long after, squeezing around Beam’s cock as he spills out onto his stomach, his chest.
He throws his head back into the pillows, muscles liquefying with every huff of air as he tries to calm down. It’s not working.
Beam slowly pulls out of him, his cock resting on the inside of Denji’s thigh, a thin trail of white connecting the tip of his dick to Denji’s ass. He rests back on his haunches, bringing his head down to Denji’s cock to clean up the leftovers. Denji’s breath catches when he brushes his thumb across the tip of his cock, wiping away a bead of cum that spurts out weakly at the touch. He meanders upwards, running his tongue across Denji’s stomach. Beam raises his head, pressing sweet, chaste kisses to his chest, his neck, until he reaches his face, where he licks off a spot that had splattered onto his jaw.
“You’re so gross,” Denji says, but he opens his mouth anyways when Beam goes to kiss him, his mouth tasting like himself. They make out for a moment, not really building up to anything, just relishing each other’s warmth until Denji swings his legs out of the bed and hobbles to the bathroom to clean himself up.
When he comes back, he grabs his briefs from where they are strewn across the carpet, and fumbles them on before flopping onto the bed. The sheets smell of sweat and jizz, but Denji doesn’t care. He’ll let whoever’s unlucky enough to have to clean their room worry about it.
Beam immediately wraps his arms around him, tangling their legs together. “Lord Chainsaw is so cute when he comes.” He grins, “his face scrunches up like this.”
Denji splutters, pushing a pillow into Beam’s face. Beam only tightens his embrace, curling around him. He would try to wriggle out of his hold any other time, but his ass hurts and his legs ache and right now Denji just wants to go to sleep.
Beam noses his skin. “Lord Chainsaw, I think I love you.”
Denji freezes. There’s heat trailing up his neck, and he knows Beam can see it, can feel it too. “You’re so stupid.”
“Maybe,” Beam replies, mumbling against his shoulder, “but as long as Lord Chainsaw is here, I don’t mind being an idiot.”
Denji can’t say anything in response. They fall asleep like that, intertwined in each other.