Haru digs his fingers into the bruises on Rui’s hips, pressing, pressing, pressing, until she hisses.
He keeps pressing, and her back arches as she moans. Her voice is so pretty when she feels good, and he tells her so.
“That hurts,” Rui pants. “Do it again.”
Haru does, and Rui’s face goes bright red, her moan stringing out loud and long.
Haru leans forward and grinds his dick against her ass until she’s panting and pushing back against him.
“Fuck,” Rui chokes out, as Haru yanks her sweatpants down and rubs his dick along the crease of her ass.
There’s a jeweled butt plug there, nestled between his cheeks, and Haru moans. He can’t help reaching out to touch it, using his thumb to push it against Rui’s hole.
“Oh my god, Princess,” he whimpers. “How long have you been wearing this? The whole time? The entire practice?”
She spasms, moaning, as Haru keeps rhythmically tapping on it, making the plug inside fuck her.
It feels dizzyingly good, so good that Rui can’t keep track of the question. He clenches around it, pushing his bare ass back into Haru’s hand.
“The whole time,” he admits, face flushing at the memory of it, how naughty it is.
Haru moans again. “Holy shit.”
He grabs Rui’s ass in both hands, squeezing hard enough to hurt where he already has bruises. Rui whines, going up on his tiptoes trying to escape the sensation even while it makes his dick throb.
“Can I fuck you, unnie? Please, please, can I fuck you?”
It hurts so bad where Haru digs his fingers into the abused skin of Rui’s ass. It makes Rui keen, high-pitched and pitiful. His face is blotchy red. He probably looks so ugly right now.
He has the thought and is immediately snapped back to his body when Haru squeezes him again.
“Oppa,” Rui whimpers. “You can if you want to. Fuck.”
He’s breathing so hard, panting as he lets his head tip forward until it lands against the wall of the practice room with a thok. Haru’s weight against his back is suddenly removed, and then there’s warm breath against his bare skin, the sharp sting of teeth as Haru bites the underside of his ass, making Rui jerk forward and almost collide with the wall as he catches himself just in time.
Haru bites him again as he starts to slowly pull the plug from Rui’s hole.
Rui moans, his cock leaking into his sweatpants, whimpering as the widest part of the unyielding metal plug stretches him open.
Haru fucks him with it, pushing it back in and pulling it out until Rui is trembling. He finally pulls it out and leaves it, discarded and sticky, on the practice room floor.
“Unnie, you look so good,” Haru says, looking at Rui with dark, hungry eyes. “These look so good…”
He brushes his fingers over Rui’s ass, mottled different shades of purple, black, and yellow, before using his hands to spread Rui open again, exposing his twitching, gaping hole to the cool air of the practice room.
“Thank you, Haru-chan,” Rui whimpers.
“I can’t wait to give you more…”
Haru dips two of his fingers into Rui’s hole, feeling her where she’s slick and hot and open.
“You’re so loose,” he says wonderingly, and Rui chokes on a sob, pressing her legs together, needing friction on her cock.
Fortunately, Haru is so obsessed with her that Rui never has to ask for it. He fumbles with his own pants, lines himself up, and thrusts his cock into him. Haru humps him in quick, hard strokes, using Rui selfishly while praising him for how pretty he is, what a good girl he is.
Rui moans like a good girl, widens his legs and lets oppa use him, tries not to get the mirror dirty by humping his cock against it.
Rui is taller than Haru, enough that he has to widen his legs so that Haru can fuck him. He feels dizzy with shame at the idea, letting their maknae fuck him raw in the dance studio of all places.
But Haru’s been so fixated on him lately, and it feels good to be wanted. Rui has such a hard time saying no to that. He’s so eager, treats her like he’ll die if he can’t have her, wants her all the time, to the point that her body is constantly sore in new places, but that feels kind of good, too, if she pretends a little.
She feels like such a slut, wearing something like that to the practice room, hoping that Haru would pull down her pants and find it.
“Princess, you’re so needy today,” Haru groans, panting against her skin, grabbing roughly at her hips. “You feel so good.”
He bites Rui on the shoulder, too hard to be sexy, which makes her jerk.
“Haru,” she warbles and has to fumble to get a hand around her cock—she can’t take it anymore, doesn’t care. She’s jerking herself off furiously, she might be crying.
Haru moans against her shoulder when she clenches around him, trying to chase her own orgasm before he finishes. He’s still biting her, making starbursts of pain pop behind her eyes, pushing her closer and closer to the edge when he pushes his hips against hers one last time, thrusting as far inside her as he can go and spilling inside, making her all messy.
He pants against her, catching his breath, and Rui’s hand speeds up on his cock, stroking himself furiously until he cums against the mirror with a shout.
He’s afraid to open his eyes. Doesn’t really want to see what he must look like in this moment. It’s probably terrible.
She feels too empty, later, when Haru pulls out, sweaty and leaking and yapping like an overexcited puppy, saying noona, we should get dinner, do you want Korean food again while Rui drips cum down the inside of her leg.