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Before Minho can suck in a full breath, Seungmin bites his thigh. It hurts. It feels like he's opened his mouth as wide as he can so he can fit as much skin in his mouth as possible. He's latched onto Minho's quad, right above his knee, in a supremely tender spot.
"I'm going to kill you," Minho tells him. "I'm going to kill you so bad."
Seungmin sinks his teeth in harder. It hurts like a bitch.
"Enjoy it while you can," Minho hisses. "You're dead, Kim Seungmin."
He breathes through the rest of it, inhaling and exhaling calmly through his nose, until Seungmin's jaw runs out of juice. Then Seungmin laughs and pulls away with a wet sound, leaving a dark ring of indented teethmarks. Minho bends his knee with a curse. He catches Seungmin right in the middle of wiping spit off his lips; Minho tackles him, flips them, and lays him out on the floor.
He's even less nice than Seungmin was. He pushes up the leg of Seungmin's shorts and bites the side of his thigh instead of the front of it. He's going to dig his teeth behind Seungmin's IT band and rip it out.
"Hyung! Ah," he shouts, and shoves at Minho's shoulders, trying to dislodge him — a cheater until the end. Minho bites harder as punishment, putting his canines into it, then hammers against Seungmin's inner thigh with his fist until he has the decency to shut up.
"What the fuck are you two doing?" Jeongin asks, poking his head through the open door. "Oh my god."
"Hyung, tell Iyennie why you're doing this," Seungmin says breathily, his voice small. He's got to be in so much pain. Minho's lips want to smile, but he's busy. Seungmin whines at him again: "Hyung. Hyung!"
Minho is not moving. The feeling of tender skin under his teeth is heavenly; his jaw loves the workout.
Seungmin pulls at his hair, the brat. "Hyung — ahh-hahh! Ex- explain yourself!"
Minho slaps his bratty hand and flips him off, biting down into his thigh almost as hard as he can. Seungmin yells loud enough that passersby on the street outside their building can probably hear.
"Okay then," Jeongin says. "I'll just close the door for you guys. Since you're — yeah."
"No, wait!" Seungmin says, almost panicked.
Minho loses it for a second, laughs around his teeth. Then he reaches under Seungmin's shirt and pinches his stomach.
"Ah, ah, hyung — I just told him that I'd let him bite me, and he went crazy like this," Seungmin pants.
Minho giggles. Then he drills his teeth in harder and starts to suck.
"Ahh, fuck, hyung, stop!" His voice is lovely.
In truth it had gone more like this:
"Can I bite you?" Seungmin had asked.
Minho had made an ugh face. He'd almost said "pass".
But Seungmin had said, "If you let me bite you, just once, I'll let you bite me back."
It had been a very tempting offer.
Then Seungmin had added the clincher. "Whenever and wherever I bite you," he'd said, "you can bite back harder."
"Deal," Minho had said instantly, before Seungmin could think better of it. What a cute little dummy.
And so they had gotten to this point.
"Wait a second," Jeongin says. "Are those hickies? You guys are going to be in so much trouble!"
Jeongin's lucky he can only see the skin that's not covered up by clothes. Minho has left a massive art piece on Seungmin's belly, pink and purple and blue, that he won't be forgetting for a while.
"It's his fault," Seungmin says pitifully, trying to shove again at Minho's forehead. "I'm the victim here — ahh!"
"But they're all over Minho-hyung too," Jeongin points out, wise to Seungmin's nonsense.
At some point, one of them had started sucking. In fairness, it had probably been Minho. Occasionally, he couldn't control himself.
"Ow, ow, oh my god, hyung!" Seungmin says, his voice shaking now, his breath coming in and out only as frantic hisses. "Aren't you tired yet? We have practice tomorrow morning, you're not going to like it if I get all stiff."
Seungmin should have thought of that before he started this tit-for-tat game, and especially before he'd gone for the legs. Minho would have been fine with keeping it all above the belt. Still, he gives a last warning gnaw to the side of Seungmin's thigh, digging in one last time with his incisors, letting Seungmin get out a last few muffled cries and whining sounds. Then he pulls off. He takes a deep, satisfied breath.
"Are you done?" Jeongin asks, sounding uncomfortable. "Should I close the door or not?"
"That's up to Kim Seungmin," Minho says.
Kim Seungmin who's sitting up, his eyes glinting crazily. Kim Seungmin who's grabbing for Minho's ankle, peeling off his sock.
"Oh. Are you sure?" Minho says kindly.
Seungmin wordlessly bites into the edge of Minho's foot, lower teeth digging pleasantly into the sole.
"Alright then, since you're asking for it," Minho says. He stares into Seungmin's eyes. He looks so cute and edible.
"Ooookay," Jeongin says. "Have fun, hyungs. I guess. Please keep it down." He closes the door on them.
"How unlucky for you," Minho says, as Seungmin bites down. "Now you're trapped in here with me."