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Rin is not in a good mood today. Isagi senses it the moment he steps through their doorway, and it only sharpens his hunger. He’s come to learn that he receives the most pleasure in scenes where Rin is irritated, because it sharpens his sadistic tendencies and makes him all the more cruel with Isagi.
Which is how he finds himself cuffed to their bedposts wearing nothing but his underwear, arms restricted but legs left free so that Rin can watch him struggle. A low buzz filters through their room, constant and demanding, and Isagi curses. Desperate for a distraction, he chooses to focus on Rin instead, eyes following the movement of those slender fingers unbuttoning the cuffs of his dress shirt and rolling them up. Rin’s sea green eyes meet his as he yanks his tie off, and Isagi’s mouth goes dry at the sight of Rin’s forearms flexing.
The temperature in the room seems to have shot up by several degrees. He squirms against his restraints, trying desperately to relieve some of the pressure the vibrator inside him is causing. Across from him Rin sits, arms crossed as he watches Isagi.
His face is a picture of disinterest, as if Isagi is failing his expectations. With a sigh, he reaches behind him, pulling out a tiny controller, and presses a button.
The effect is immediate. In front of him Isagi shudders, his breath escaping in pants as the pleasure wracking his body intensifies. A trail of sweat glistens as it trickles down his chest, and Rin’s eyes track it all the way down to Isagi’s toned stomach, where it stops just above the waistband of his boxers. The way Isagi’s cock strains against the fabric looks painful.
Good. He wants it to hurt. Rin leans closer to Isagi, tilting his chin up with one finger, and takes in the flush of Isagi’s cheeks, pupils blown wide like an inky abyss. He runs his thumb along the bottom of Isagi’s mouth and his lips part further.
“Do you know how long it’s been?” Beneath his touch, Isagi swallows, his throat bobbing as he shakes his head unsteadily. The pulse against his fingertips is erratic and fragile, reminding him of how much Isagi is at his complete mercy. He suppresses the urge to wrap a hand around Isagi’s throat.
Rin’s eyes narrow.
“I asked you a question, Isagi. Answer me with verbal responses or I won’t let you cum at all tonight.”
At this, Isagi squeezes his eyes shut with a whimper, and he manages a shaky reply. “I…I don’t know.” A thin line of drool escapes the edge of his lips. “It’s too much.” The distance Rin is maintaining makes him ache, and the heat of Rin’s touch along his jaw burns as much as he wants to be consumed by it.
Almost as if he can sense Isagi’s desires, Rin pulls back, leaning against the headboard. Isagi’s disappointment is evident in the way his body droops.
“It’s only been five minutes.”
Fuck. Before they’d started this scene Isagi had agreed to hold out for at least half an hour. Judging by the calculative glint in Rin’s eyes, this could last a lot longer.
He tenses when he sees Rin’s hand moving towards the controller again, but it’s just to move it to the side.
“Come here.” Rin curls a finger towards him, and Isagi has no choice but to obey. He can barely make it six inches forward before the cuffs around his wrists start digging into his skin, and it’s impossible for him to go any further without eliciting pain. Thankfully, Rin closes the remaining distance between them until they’re face to face.
Isagi’s heart jackhammers in his chest. He sits as still as he can, skin turning hot as Rin takes several agonizing moments to rake his gaze over him. The look in Rin’s eyes makes Isagi feel like prey waiting to be devoured.
“Take my belt off.”
At first Isagi thinks he’s heard him wrong. His fingers flex behind his back, useless in their current position. “...How?” For a moment he thinks Rin might reprimand him for questioning him, but a cruel, half-smile only ghosts his face.
“You’ll figure it out.” When Isagi hesitates further, he raises an eyebrow. “If it’s not off by the half-hour mark, you can forget about any reward.”
He definitely doesn’t want that. Isagi wracks his brain, worrying his lip between his teeth as he tries to come up with a way to satisfy Rin’s order. Then it hits him.
“You can’t be serious,” he protests, but Rin only fixes him with a cold, expectant look.
“Are you saying you can’t do it?”
Isagi scowls defiantly. “I never said that.” Slowly, he lowers his head to Rin’s lap, cheek brushing against the dark fabric of his pants. In front of him, the silver buckle on Rin’s belt glints, completely secured, and he wonders how the hell he’s going to take this thing off in the next twenty-five minutes.
The kiss of cold metal spreads across his tongue as he mouths at the buckle. Pulling the belt end out of the loops is the easy part. What’s proving nearly impossible is freeing it from the prongs holding it in place.
He clamps his teeth over the leather, furiously tugging it to the side. It feels dehumanizing, being reduced to a puppet whose sole purpose is to undress Rin, and Isagi flushes with humiliation at the arousal that courses through him. From where he’s bent, he’s glad that Rin can’t see his face.
Rin was only half-hard when he started, but as Isagi’s face continues to brush against him in his sloppy efforts to take the belt off, Isagi begins to feel him fill out completely.
Even though Isagi’s expression is hidden from him, Rin knows every single one of his tells. When Isagi rubs his thighs together, squirming slightly, he knows he’s getting off on this too. Brat.
Rustling from above has Isagi’s ears perking. He jolts when he feels a warm finger pressing at his entrance, wet with Rin’s spit. Whimpering when he realizes what Rin is about to do, Isagi speeds up his efforts.
Already loosened from his preparations earlier, Rin slides in without much resistance. He pets the insides of his walls until he reaches the vibrator, and Rin presses against it until it’s reverberating directly against Isagi’s prostate.
A strangled moan rips out of Isagi’s throat. Squeezing his eyes shut in an attempt to steady himself, he pulls again at Rin’s belt, albeit at a much slower pace than before. It’s getting to his head, this proximity to Rin. Everything smells like him, he thinks, the intoxicating scent of his cologne, and his mind swims. His nose bumps against one of Rin’s shirt buttons as he angles his head to the side, and he takes short, measured breaths that don’t bring nearly enough air to his lungs.
Another click, and Isagi chokes around a scream. Not only has Rin increased the intensity of the toy, he’s added another finger. He strokes the insides of Isagi’s walls languidly, as if he isn’t crying out beneath him and begging for release.
Isagi struggles against his restraints, trying in vain to inch away—anything to escape Rin’s skilled fingers that know how to turn him into a writhing mess every time. He can’t cum right now. Not without Rin’s permission, or else his punishment is going to be far, far worse.
A hand settles firmly over the back of Isagi’s head, and presses. “You’re taking too long,” Rin warns, stern tone not betraying any hint of his arousal, and panic flares bright through Isagi. After several more attempts he finally manages to thread the belt end out of the buckle, and he yanks the remainder from the belt loops inch by inch, until he drops it to the bedsheets, trembling from Rin’s touch and the effort of staying so long in that position.
The leather is soaked with drool. Cheeks burning, he manages to lift his head and meet Rin’s dark gaze. He draws out of Isagi moments later but doesn’t turn off the vibrator, leaving Isagi to shift restlessly before he pins him in place with a firm grip around his waist.
“You finished just within thirty minutes. Do you think you did a good job?”
Isagi's heart stutters. Is this some sort of trick question? Will Rin deny him release if he answers incorrectly? “I—I think so,” he responds, biting his lip when Rin begins to trace shapes along his hips.
“You did well,” he agrees, and Isagi flushes at Rin’s praise. He looks at him imploringly, wondering if he’ll be rewarded, until he crushes Isagi’s hopes again.
“But we’re not done yet.”
Isagi lets out a weak moan as Rin digs his fingernails into his skin, drawing out pain in the way he’s come to learn Isagi likes. He figured it out one summer night, when Isagi gasped in his arms as his grip tightened, and hasn’t stopped doing it since. Just as he likes his handcuffs a little too tight, leaving red marks against his skin, he also likes being marked by Rin this way.
“How much longer?” he breathes, and Rin’s gaze ices over.
He shrugs, lifting a shoulder. “However long I feel like.”
At this, a look of distress washes over Isagi’s face. It’s one thing to know how long he needs to withstand, and a completely different thing to continue on without knowing when the end is near.
Rin’s fingers finally stop their torturous circles along Isagi’s hips, and he slips his hand into Isagi’s underwear. His fingers wrap around his boyfriend’s dripping cock, and Isagi’s eyes snap open when Rin brushes the edge of his slit. Slowly, he strokes along the head of his cock at a rhythm that makes Isagi whine, and Rin’s desire to take him apart only burns deeper.
It doesn’t take long to turn him into a mess. Isagi’s cries fill the room in a stream of begging that rushes through Rin’s blood. He feels Isagi thrashing beneath him, chest heaving as he tries to resist his orgasm.
“Rin,” he pleads, voice hoarse. Isagi’s chin dips down, and by the way his breath hitches, Rin knows he’s close.
He continues to stroke Isagi, focusing on the underside of his shaft and thumbing at his slit, and Isagi tenses further until Rin thinks he’ll break apart. “I can’t, I can’t—”
Just as Isagi is about to tip over the edge, Rin grips the base of his cock and squeezes ruthlessly, denying his orgasm. “You’re done when I say you’re done,” he hisses, low in Isagi’s ear, and Isagi sobs. In desperation he tries to rut against Rin’s hand, but he has Isagi trapped in place.
A whimper rises from Isagi’s throat as he blinks rapidly, trying to stop the tears threatening to fall on his face.
Rin studies Isagi’s trembling figure. From his view, he can see Isagi’s hands twitching, fingers grasping at empty air as if to hold on to something, and he knows that Isagi wants to hold onto him.
Isagi sniffles, eyes glossy and wet, and Rin decides he deserves his reward.
He lifts Isagi onto his lap, undoing the restraints so that Isagi can lean forward into his chest. Smoothing a hand over Isagi’s hair, Rin tilts his head up until he’s looking directly at him.
“Do you want to cum?”
Something possessive curls in him at the sight of Isagi’s tear-stained eyes squeezing shut in embarrassment as he nods feverishly, sinking into Rin’s embrace. “Yes,” he breathes, barely audible.
Carefully, he works Isagi up to a breaking point again in his hand, caressing him with his burning fingers along his leaking cock. A tortured moan falls from Isagi’s lips as he claws weakly at Rin’s chest, hips stuttering against his suffocating touch as he brings Isagi closer and closer to completion. He’s completely gone at this point, letting Rin do as he pleases, and he licks a line along the column of Isagi’s throat, feeling him shiver against him.
He loves it when Isagi is obedient like this for him. Only for him, and no one else.
In the next second, Isagi stiffens on top of him, breath catching in ecstasy, and Rin absorbs it all as he falls apart in front of his eyes. Isagi’s cum drips between his fingers, and it makes an obscenely wet sound as Rin continues to stroke him through his climax, slowing his motions as Isagi gradually comes down from his high.
His voice has taken on the raspy quality that appears when he’s experienced a particularly intense orgasm, and Rin cups his face with one hand, rubbing his thumb across Isagi’s cheekbone in a soothing gesture.
Through his smudged lashes he peers up at Rin, still trembling slightly. “Turn it off, please,” he pants softly, and in his trance of watching Isagi, Rin realizes the vibrator is still on.
He shuts it off quickly, and Isagi finally droops against him, head slumping on his shoulder in exhaustion.
“You did very well,” he praises, and Isagi hums contentedly. He begins to doze off on Rin, breath tickling his skin, and he indulges him for a short while, carefully reaching for a towel on their nightstand to clean Isagi off.
Eventually Rin wakes him with a pinch to his nose, and he blinks his eyes open drowsily. Rin lets Isagi sit up, reorienting himself, and a crimson blush washes over his face when he feels what’s pressing against him.
Rin drags him down, appetite far from sated as he flips Isagi onto his stomach. “You’d better prepare yourself for another round.”
He’s going to ruin him.