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Riku thinks he’s going to explode.
“Mmph, fwuck,” he gasps, words gargled as he moans around two of Sion’s fingers that have been shoved deep in his mouth, the digits hitting the back of his throat in a way that is so fucking filthy to Riku that he doesn’t even think about his gag reflex. It’s as if he’s forgotten how to even choke–forgotten his name in a haze of arousal, the words not even forming in his head.
He’s lying down on Sion hyung’s bed, on his stomach with his legs off the edge of the bed. Sion’s bed is low enough that his knees touch the floor and he’s sure the skin is slightly bruised now but the ecstasy he’s experiencing is more than worth it.
Sion’s thrusting his cock up into him from the back, and even though Riku can’t see his hyung’s face, his eyes roll up into his lids at the thought of how sexy the older must look like right now. Sion’s still wearing his black fitted tank top, the one that he always uses to thirst trap on Weverse–which Riku hates, by the way. He dislikes the way his hyung shows his body off to everyone out there but he doesn’t have a say in it anyways. Sion isn’t his, and he isn’t exactly Sion’s. Riku is nothing more than a hole for Sion to fuck into, which he tries to convince himself that he’s perfectly fine with (he’s not).
He’s greedy, always greedy for more, and while Riku would normally verbalize this so Sion can give into him, today’s special. It’s his hyung’s birthday, and he had promised that he would be able to do whatever he wanted to Riku, so Riku keeps his mouth sewn shut. He’s drooling around Sion’s thick fingers, sure that saliva is dripping onto the pink garland that he wore as a joke. It reads out ‘the present is me’, and while Riku had laughed when Sion asked him to wear it, he knew that the older was truly up to no good.
He feels branded, and the idea of being Oh Sion’s possession makes him even more turned on, unknowingly squeezing around his hyung’s thick cock, causing the movement to halt just a bit from the friction.
“Princess, fuck, you can’t just–” Sion moans loudly, pressing his forehead on the curve of Riku’s bare back. The older licks a long, wet stripe along his skin from the base of his back up to his neck, and Riku shudders at the feeling. Goosebumps prickle across his arms and he lets out a long whine, cold air hitting the line of saliva Sion’s tongue left. “You’re so fucking pretty, y’know that, baby? Love feeling you hug my cock so warmly.”
Riku lets out a broken sob, “j-just feels so big inside me, hyung,” he sounds absolutely pathetic and even cringes at the sound of his own voice, but he knows Sion loves how helpless he is.
“Yeah,” he lets out a breathy chuckle. “I can feel it with how you’re choking me up here.” Sion slowly pulls out and Riku cries at the loss of warmth. His hyung reaches over to grab his chin with a rough hand, jerking his face to the side in a sharp motion, pressing his mouth against Riku’s. Sion sucks and licks on the thick, warm muscle in Riku’s mouth and he lets his hyung explore, tongue licking into the roof of his mouth, against the ridges and the smooth flesh on the inside of his cheek. Drool and spit drip down onto the mattress below them, and Sion pulls back, a wild look in his eyes as he smiles.
The older gingerly pulls the celebratory garland away from Riku’s body where it was hanging off his neck, and brings it to the front, wrapping the rough fabric around his throat so that the two ends are now resting on his back. Sion clutches them together and yanks on it with just enough strength so that it doesn’t snap Riku’s neck in two, but still causes him to gasp in shock. The garland chokes around his neck in a way that has him feeling delirious, slightly blocking off the oxygen to his lungs.
“Hyung,” he breathes out, voice hoarse from lack of air.
“Is this alright for you?” Sion asks, genuine worry laced into his voice.
Riku nods. “Mm-hmm, feels good. Love h-how I can’t–can barely b-breathe,” he lets out slowly.
“Shit,” Sion hisses, thumb poking at Riku’s swollen pink hole, puffy and leaking with lube. “You’re going to kill me, baby. On my birthday, no less.”
Sion wraps a hand around his leaking cock, roughly pushing the head into Riku’s hole, causing him to yelp at the stretch.
“Ngh–fuck!” He lets out a cry, feeling overwhelmed at the ribbon wrapped around his neck and the deep press of his hyung’s cock. Sion thrusts hard into Riku, bottoming out until he can feel his hyung’s balls slap against his skin. His own length feels so tight, so hard and tense that the feeling of Sion’s cock so far inside him causes Riku to–
White cum splatters on the bed below, and Riku groans at how quickly he starts to get hard again, no doubt due to Sion still inside him.
“You’re so fucking cute, princess,” Sion squeezes his waist and pulls on the ribbon a little harder, finding a good momentum to thrust up into Riku. His cock hits the inside of Riku’s walls, pressing closer and closer to his prostate, until Sion finds it and the head of his length presses deep against that same spot, causing Riku to let out a babbled string of curses.
“Fuck! No, hyung, ‘s too deep, I can’t–”
“You can, baby. Take it, I know you can.”
“‘m not gonna last, it’s too big,” Riku cries, tears rolling down his cheek. In all honesty, he feels really good, but Riku thinks he’s about to lose his mind from how stretched out his hole feels. Sion lifts his hand from Riku’s waist and presses a palm below, on Riku’s toned stomach. There’s a barely noticeable bulge under his palm, and Sion presses up into it, to which Riku shakes his head rapidly. “D-Don’t press–ngh–feels weird, hyung!”
“It’s my birthday, isn’t it?” Sion leans down and whispers in his ear. “I’m going to do what I want, and you’re just going to take it. It’s your gift to me, right princess?”
Riku wants so badly to talk back, but Sion’s voice is dark and final, and it turns a coil in his stomach that feels as though it’s going to explode at any time. Sion’s cock continues to piston up into him, tip abusing Riku’s prostate with every thrust, and he’s seeing stars even with his eyes wide open. Sion continues to tug on the garland every few seconds, and it makes Riku feel like a fucking animal, but it makes him feel all the more dirty.
“Look at you, letting me take you from the back,” Sion whispers sharply. He caresses Riku’s left asscheek ever so softly before Riku feels a sharp sting on the skin, not even a second later.
Smack!
He doesn’t know why, but the pain triggers a loud moan out of his mouth, and Riku’s eyes close, savoring how good it feels. Riku never thought he was a masochist, but the feeling of his raw skin exposed to the air only tightens the coil in his stomach. “Again,” he mutters softly.
“Yeah?” Sion gasps, and Riku can hear the smirk in his voice. “You liked that? Liked it when I spanked your ass?”
Riku can only let out a muffled sound of agreement, and Sion’s hand comes to his ass again, squeezing the flesh in his palm. “You’re gonna count for me, baby. Fuck, you’re such a little whore, taking my cock like this, can’t believe you like feeling pain like this,” Sion chuckles darkly. He lets go of the garland, fabric falling to the bed as he continues to fuck Riku relentlessly into the mattress.
“I-I’ll count,” he agrees, but Riku doesn’t even know what exactly he’s counting for, if he’s honest.
“I just turned twenty-four. Can I give you twenty-four spanks on your cute little ass, baby?”
Riku moans at the thought, nodding his head vigorously. “I can do t-that, hyung,” the words spill from his mouth as if on instinct.
Smack!
“One,” Riku squeezes his eyes together, cock hard as a rock from that one slap alone, and he starts to wonder how many spanks he can actually take.
“Two.”
“Three.”
“Four.”
.
.
.
.
“Twenty-three.”
Five minutes have passed, and Riku’s sure his ass is bright red with how many times Sion’s spanked him on the same side. His hyung didn’t slap super hard, but the friction and sting is still there, which also adds to the arousal. The bed below him is covered in his own cum, and Riku feels delirious as he’s already hit his orgasm at least three more times within the entirety of twenty-three spanks.
“Hyung,” he whines. “Last one, then can you cum in me, please,” he begs. Riku’s body is tired, and even though it’s Sion’s birthday and he would do everything for the older, it’s also way past midnight and they still have schedules later on.
As if by a miracle, Sion agrees. “Okay, baby. You did so well for me. Can you cum one more time?”
Riku lets out a whine. “‘M not sure,” he says honestly. “I can try,” he says, voice shy.
“Good job, princess. One more time, ‘mkay?”
Smack!
“T-twenty-four–ngh–!” Riku lets out a loud moan as Sion thrusts particularly deep, cock buried into his warm gummy walls.
“Yeah, baby, you feel so fucking good–” Sion pants, “‘m not gonna last, I’m gonna cum–”
“Inside me,” Riku scrambles to say, hands clutching at the blanket below him as he feels his orgasm hit too. “‘M gonna cum too, hyung. With me–can you do it with me?”
“Of course, baby. ‘Gna fill you up so well, love how fucking messy you look.”
“Wanna feel you cum in me, just want you to–” Riku lets out a loud gasp as he feels Sion’s cock pulse in him, painting his hole in sticky white, the feeling of being filled up pushing Riku to tumble headfirst into his orgasm, his cock no longer leaking thick white cum but a watery, transparent liquid that has him feeling completely spent. Sion’s cock softens in him, and his hyung pulls out slowly, both of them grimacing at the filthy feeling of the older’s cum leaking out of Riku’s hole and dripping down onto the mattress.
Sion gently flips Riku around to lay on his back, and he feels all fucked out, eyes barely even open.
“‘M sorry, princess. Was I too hard on you?”
Using the last bit of his strength, Riku shakes his head ever so slightly. “No, hyung. I loved it. You were so good to me. Happy birthday, Sionie hyung.”
Riku’s eyes close and his head droops to the side just a little, chest rising and falling in a steady constant beat that has Sion cooing at the sight. He lays down next to Riku, and despite feeling sticky and gross all over, Sion presses his lips against the younger’s temple, whispering softly, “thank you, baby. For spending my birthday with me like this. I promise, I’ll make it up to you soon.”