Pleasure Over Silence – CS
MINOR DO NOT INTERACT.
Pairing: Idol!Choi San x afab!Reader Word count: 3.7k Genre/Content Warning: This story is Explicit Sexual Content exploring a Best Friends to Lovers dynamic initiated by Caught Masturbation/Humiliation. The entire encounter is defined by an intense Dominance/Submission dynamic, mentions of “Traffic Light Rule”, a form of Rule Play that invalidates regular verbal protests (e.g., screaming “stop”). The scene features Intense Fingering (dual climax) followed by Intercourse p to v (triple climax) and includes Possessive Handling where the Reader scratches his back in the height of pleasure. Uses of endearments such as Princess and my dear (to reader). Please note: This content is for mature audiences only. It centers on a dominance fantasy where a friendship boundary is explicitly broken, and the Dom ignores typical verbal protests, relying only on a specific safe word system. The sexual content is explicit and high-intensity. Reader discretion is strongly advised. A/N: I apologize, but I’m too needy right now. Had to write this quickly just because. I used spin the wheel for this one and it pointed to San. Couldn’t think of any member who is suited for this genre. Lust spreads too fast in my body. No more italic words or highlights whatever. Just enjoy reading.
The digital clock on your nightstand glowed 11:58 PM. Just two minutes shy of midnight.
The air in your apartment was thick and warm, smelling faintly of the lavender sheet mask you and San had peeled off twenty minutes ago. The remnants of your epic sleepover—scattered Monopoly money, a pile of discarded card decks, and two empty bowls of chips—lay testament to the hours of innocent, utterly platonic fun you’d just shared. The sheer exhaustion from laughing and arguing over board game rules should have put you straight to sleep. You were lying on your side, facing the wall, your body a rigid, coiled line against the soft mattress. Beside you, San was a warm, heavy weight, utterly relaxed and sinking into the duvet. He was curled around his favorite plushie, Shiber, his breaths coming in slow, steady intervals—the picture of blissful, peaceful oblivion. The soft smile still playing on his lips, perhaps dreaming of winning the last round of Jenga, was agonizingly innocent.
But peace was the furthest thing from your mind.
You felt a restless, frantic energy vibrating through you, a searing, insistent ache that refused to be quelled. It was a purely carnal need, sharp and demanding, that felt ready to bubble over, and the crushing irony of the situation—having your gorgeous, desirable idol best friend mere inches away while you burned with frustration—was almost unbearable. Every breath he took felt like a cruel joke, a reminder of the chasm between the casual intimacy of your friendship and the explicit desires currently consuming your mind. The scent of his familiar body wash only amplified the problem, making the boundary between best friend and fantasy agonizingly thin. You needed a release, and you needed it silently and desperately.
A searing, demanding need was clawing at your insides, a desperate, insistent ache that felt ready to bubble over. You had tried every distraction: scrolling through old social media feeds, and then, in a moment of pure, dangerous recklessness, you opened the incognito browser. You started with general smut, searching for faceless, nameless men, but it only stoked the flame without providing release. Then came the slip: you searched for your best friend, Choi San. The fiction you found was detailed, explicit, and centered on you. Reading a fic about him whispering those things, touching you like that—it was devastatingly effective. Your breath hitched, and a slow, hot tide of wetness flooded the delicate cotton of your panties.
He was right there. Right. There. Asleep.
You fumbled silently, retrieving your wireless earbuds. You plugged them in, choosing an audio clip of soft, breathless whimpers and gasps. You turned onto your side, facing away from him, and slid your right hand under the duvet. The gentle circular motion on your clit was electric, amplified by the sounds flooding your ears. It wasn’t enough. The silence in the room, the awareness of his proximity, was a terrifying counterpoint to the pleasure. You bit down hard on your lower lip, fighting the moan that threatened to claw its way out of your throat, forcing all the sound inward. You were panting, breathless, your chest rising and falling rapidly. Driven by the need, you silently dragged your left hand up to your chest, gripping and kneading your tits, the simultaneous sensation almost overwhelming. The need for release became a frantic chase. You moved faster, your whole body tightening, the need for subtlety lost to the pursuit of the edge. Your hip began to rock involuntarily, a small, rhythmic, almost imperceptible movement against the bed.
It was the movement that did it.
San stirred.
He mumbled something into Shiber, then shifted, his eyes fluttering open. The glow of the nightlight caught his gaze, which drifted to the frantic movement beneath the covers right beside him. He blinked once, his expression shifting from sleepy confusion to dawning, dark understanding. He saw your back rigid, your chest heaving, and your mouth silently open as you fought the noise. He reached out, his warm, heavy hand resting right on your hip, instantly stilling your frantic movement.
The sudden, firm touch of his hand, heavy and warm, landing precisely on your hip, was a shock that shot through your entire body like an electrical current. The wave of pleasure you’d been chasing instantly evaporated, replaced by a scorching tidal wave of mortification and panic. You froze completely, your hand locked beneath the damp cotton of your pink panties, the physical evidence of your desperate actions trapped with you. The audio whirring in your ears felt deafeningly loud and incriminating. You could feel the heat radiating off his body where he pressed against your back, but the closeness offered no comfort—only terrifying exposure.
His voice, low and thick with the rough edges of just-interrupted sleep, sliced through the frantic audio in your ears, cutting through the silence of the room and the noise in your head.
“What are you doing, Princess? You didn’t wake me up to help you.”
He shifted, leaning over you. His pout was visible under the dim light in your bedroom. He reached out and gently plucked the abandoned phone from the pillow beside you. He saw the open browser tab, the title of the fanfiction highlighted in the soft glow. A slow, knowing smirk spread across his lips, his eyes gleaming in the near-darkness.
“Oh? What is this? You’re reading fics about me fucking you, huh? You’re that dirty little naughty girl who is thirsty for her best friend.”
The weight of his hand on your hip, the shock of his voice, and the devastating realization that he had seen the evidence of your naughtiness locked you in place. You yanked the earbuds out, your heart hammering against your ribs, shame and scorching heat flooding your face. You wanted to scramble away, to hide under the pillow, but his hand was a solid anchor, keeping you pinned on your side.
“S-San, I—” You couldn’t form a coherent sentence.
He didn’t remove his hand; instead, his thumb began to trace lazy, intimate circles over the curve of your hipbone, a contrast to the firm grip that was keeping you from moving. He lowered his head until his breath feathered against your ear.
“You were so focused on being quiet,” he whispered, his voice dangerously soft, “that you forgot you were shaking the whole bed.”
He took the phone, glanced at the screen again, and chuckled—a low, husky sound that resonated against your eardrum.
“Reading about me fucking you, huh? That’s quite the dedication, Y/N. Especially with the real thing right here.”
He shifted closer, pulling you back against his chest until you could feel the hard, warm line of his body—the body you’d just been reading about, the body that was very much awake now.
“Why go through all that trouble? The earbuds, biting your lip until you practically bleed,” he murmured, his hand sliding away from your hip and moving with deliberate slowness down to your lower back. His fingers paused just above the spot where your hand was trapped beneath the cotton panties.
“You know I don’t sleep that soundly, especially during a sleepover,” he continued, his tone laced with teasing disappointment. “If you were going to be this loud,” he applied the slightest pressure to your lower back, “you should have just woken me up. I would have much preferred to hear the real thing, Princess.”
His thumb brushed the very edge of the damp cotton that was sticking to your skin. The heat of his touch, combined with the shame of being caught and the sudden, explicit invitation, sent a fresh wave of need through you.
“San, stop,” you managed, your voice barely a rasp.
“Stop?” His lips brushed your shoulder, and he chuckled again.
“We were just about to start, and now you want me to stop?”
His hand slid lower, his fingers ghosting over the edge of your underwear, close enough to feel the evidence of your excitement. “I can feel how wet you are, Y/N. And you’re still so tense. I think the smuts did a poor job if they left you like this.”
He let go of your lower back and gently nudged your shoulder, making you roll onto your back to face him. He was leaning over you, his eyes intense and captivating in the low light.
“Let me help you relax, my dear,” he said, his voice dropping to a seductive promise. He took your hand—the one that had been doing the work—and kissed the inside of your palm, his eyes never leaving yours.
“No more reading. No more silence. Let’s make some real noises instead.”
The air crackled with a dizzying mix of desire and the sudden, exhilarating realization that the fantasy was now reality. San’s eyes, dark and heavy-lidded, held yours, completely erasing the innocence of the board games and face masks. He still held your hand, the one he had kissed, pulling it to rest gently on the sculpted muscle of his chest.
“We’re best friends, Y/N,” he murmured, his voice a low, intimate rumble. “We have to keep this fun and safe. No backing out, no matter how much you might panic and whisper ‘no’ when you’re close to the edge.”
He leaned closer, his expression earnest despite the heat in his eyes. “We use the traffic light rule tonight, okay? I’ll be listening. Anything you say—‘stop,’ ‘don’t,’ ‘later’—doesn’t count, that’s just noise. You have to tell me which color you need.”
He tapped your chest gently, emphasizing the rule. “Green means go, keep going, do more. Yellow means slow down, check in, almost there. Red means stop immediately, everything stops, and we cuddle until morning. Got it, Princess?”
You managed a shaky nod, the word Red feeling impossibly far away from your current, desperate state.
“Good,” he breathed, a triumphant, dangerous smile returning. “Now, where were we?”
He didn’t wait for an answer. He moved, shifting his weight over you, supporting himself on his elbows. He brought his face close to yours, capturing your lips with a kiss that was slow, deep, and absolutely thorough—a complete opposite to the desperate, quick kisses from the fanfiction you’d been reading. He was taking his time, establishing control, and establishing the reality of the moment. His hand, the one that had been resting on your chest, drifted down, tracing a scorching line over the thin material of your lingerie. His fingers finally found the edge of your damp cotton panties, pausing right where your own fingers had just been working so frantically.
He nudged his hips forward slightly, applying a very gentle, maddening pressure where your thighs met.
“You were so close, Y/N,” he whispered against your mouth before pulling back an inch. “I want to take you there. You just need to tell me what color you want me to be.”
You looked up at him, the heat pooling deep in your core a fierce, undeniable ache. Your voice was tight, barely audible.
“G-green,” you managed, the word a breathless submission.
San’s eyes darkened immediately. “Green it is, Princess.”
The simple instruction was all the permission he needed. His hand slid beneath the thin material, finding the slick heat of your core. He didn’t start with the gentle caresses you’d used; instead, his thumb found the hard, swollen peak of your clit, applying a firm, circling pressure that made you gasp, finally breaking the silence you’d been fighting all night. Your back arched against the mattress as the sensation exploded through you. You didn’t just gasp; you let out a strangled cry, a sound that was immediately swallowed by his mouth as he kissed you again—harder this time, deeper, drowning out any sound you might make.
His other hand moved to your tits, leaving the delicate lace of the bra untouched as he squeezed and teased the already aching peaks of your breasts through the fabric, mimicking the frantic grip you’d used minutes before. He pulled back from the kiss, resting his forehead against yours, both of you breathing heavily. His thumb was mercilessly fast, focused entirely on driving you higher.
“You’re not so quiet now, are you?” he breathed, his voice laced with triumph. “Do you still want to keep going, Y/N?.”
You could only pant, the feeling too intense, too glorious, and too sudden. You gripped the silk sheets beneath you, unable to speak, unable to move, trapped on a soaring wave of pure sensation. The tension was rapidly building, everything dissolving into the rhythmic pressure of his thumb.
“S-stop... Please, stop it!” You choked out, uselessly invoking the discarded safe words.
San only smirked, reminding you of the rule. “Hmm. Calm down, Princess. Color?”
You pushed the last vestiges of shame away, focusing only on the need to cross that final, shuddering line.
“Green—oh my god.” You gasped, the word a desperate plea. "Please, San. G-green.”
The declaration of Green was a spark in a tinderbox. San didn’t need further instruction.
“My pleasure, Princess,” he muttered, his voice thick and low, accepting the challenge.
He accelerated the motion of his thumb, adding a frantic, teasing pace that sent the pleasure spiking into agony. He leaned down, burying his face in the sensitive curve of your neck, his teeth gently nipping your skin as you arched harder against him, finally unleashing the strangled, gasping cries you’d been fighting all night. He pulled your hips forward, pressing the heel of his hand against your core, ensuring every movement was concentrated on the very peak of your pleasure. The edge arrived quickly—a sudden, beautiful, catastrophic break. You convulsed beneath him, your body seizing, your fingernails digging into the silk sheets as the first, powerful wave of orgasm crashed over you. You cried out his name, a muffled, desperate sound against his shoulder.
He kept the pressure steady, riding the peak with you, murmuring breathless congratulations and explicit praise into your ear until the shudders began to subside. He waited only a moment, allowing you to catch your breath, before his thumb slowed to a torturous, teasing pace.
“That was just the warm-up,” he breathed, pulling back just enough to look into your dazed, heavy-lidded eyes. “Give me a color, Y/N.”
You were already sinking into the sensual exhaustion, but the remnants of the feeling, coupled with the sight of him above you—his eyes gleaming, his chest heaving—ignited a fresh spark of desire.
“Still... Green.” you whispered, the word tasting like submission and want.
He smiled, a dark, devastating flash of teeth.
“Wonderful. You’re doing so well for me, my dear. So, so good.”
He changed his angle, his fingers sliding lower to stroke and trace, moving away from the direct pressure only to return with shocking, pinpoint accuracy. He used the slickness of your release to his advantage, driving you higher with expert, deliberate movements. This time, the sensation was deeper, a slow burn that built with focused intensity. Your moans were louder now, uncensored by shame, lost in the intimacy of the room.
The second orgasm was a slow, delicious tremor that started deep inside your belly and rippled outward, leaving you breathless and clinging to his shoulders. San pulled his hand out, finally allowing you a chance to breathe, his own breaths ragged. He looked down at the slick evidence of your pleasure on his fingers, a look of profound satisfaction on his face.
“Two down,” he murmured, quickly shucking off his pants and boxers in one swift movement.
The sight of his erection, hard and ready, was confirmation that his patience was nearly gone. He moved between your legs, the sudden, warm weight of him pressing gently against you. He didn’t rush. He guided your legs to wrap around his hips, aligning himself with the hot, wet friction his fingers had just prepared.
“You look beautiful, Princess,” he said, his voice low and shaky with his own needs. “But I think we need a little less fiction and a little more reality now. Like this.”
He paused, resting his forehead against yours again, seeking one final confirmation. “The traffic light rule is still on, Y/N. What color do you need for this?”
The feel of his smooth, hard length pressing against your wet entrance was unbearable. The ache was demanding, pulling you forward. You gripped the silk sheets beneath you, tilting your hips upward in an obvious invitation.
“Green,” you gasped, your eyes closing on the word. "Please, San. I need you inside me. I beg you.”
He entered you in one slow, deliberate push, filling you completely. You cried out again, a sound of pure satisfaction and shock at the intimacy and depth.
“Perfect,” he whispered against your mouth, already beginning the slow, powerful rhythm you had only dared to read about moments ago. “So perfect for me.”
The rhythm he established was instantly consuming—deep, fast, and driven by a primal need that matched the frantic desperation you’d felt earlier. The feeling of his hard length filling you where his fingers had just been was a dizzying shock, quickly morphing into an overwhelming pleasure that eclipsed everything else. He moved with powerful, tireless strokes, his breath ragged against your neck, his focus entirely on driving you toward a spectacular release. The friction built rapidly, driving the sensation to an almost unbearable pitch. You were instantly swept away, your body unable to cope with the intensity. The pure, uncensored urgency of the moment tore the safe word rule from your mind.
“S-stop. Oh, God, stop! San, I can’t—it’s too much!” You screamed, your voice raw, the words useless against the force of his desire.
Your hands flew up, not in a gesture of resistance, but in a frantic, desperate attempt to anchor yourself to the only solid thing in a world that was rapidly spinning out of control. Your nails, sharp and unforgiving, dug deep into the gorgeous, sweat-slicked canvas of his back muscles, leaving stinging crescent marks behind in the heat of the moment. You were clinging to him, demanding that he hold you steady while simultaneously urging him on with the ferocity of your grip. San didn’t flinch. He didn’t slow his frantic pace; his rhythm remained utterly relentless. If anything, the painful, possessive pressure of your nails seemed to serve as a direct, physical catalyst, fueling his intensity and driving him harder. He lowered his head, his lips pulling back in a predatory grin, his eyes dark, fixed, and utterly unyielding as they bore into your face.
“Mmm, I know what your body needs, Princess. Stop resisting, yeah?” He chuckled, the sound of a low, husky vibration that you felt deep inside your chest.
He paused for just a heart-stopping moment at the peak of a stroke, leaning his weight onto your hips, capturing your gaze.
“Stop is not the word I needed to hear, Y/N,” he growled, the reminder of the rule a stark contrast to the explicit chaos of the moment.
“You can scream ‘stop’ all you want. You can scratch me, bite the pillow, and cry my name. But until I hear Red—”
He withdrew slowly, agonizingly, and then slammed back into you with a thrust that stole your breath and made the world dissolve into sensation.
“—I am going to keep going until you shatter for me.”
He settled into a relentless rhythm, his hands gripping your hips now, lifting them to increase the angle and the depth of penetration. The urgency was fierce; you were on the precipice again, the edge of a third, shattering orgasm rushing toward you with alarming speed. You could only cling to him, the primal need to find release overwhelming the instinct to beg him to slow down. He was right; your body was demanding this, demanding him. San took your gasping cries and pleas of “stop” as pure encouragement, the traffic light rule keeping him focused and relentless. His body was a perfect machine of pleasure, driven by the intense desire he had fought to suppress all night.
He watched your face, catching the exact moment your eyes rolled back, your breath hitching on a fragmented sound that was half pain, half ecstasy. He focused entirely on that one spot, increasing the pressure and velocity until every stroke was a direct, targeted force. You were beyond thought, beyond speaking, beyond the humiliation of being caught. There was only the feeling of him moving inside you, deep and fast, the friction building into an unbearable, exquisite peak. You squeezed your eyes shut, your entire core tightening around him as the climax hit—a ferocious, all-consuming wave that felt deeper and harder than the ones before. Your legs trembled violently around his waist, your hips bucking against his control.
He felt the tremors rack your body, and he let out a low, guttural roar, allowing his own restraint to finally snap. With a final, explosive thrust, he released his own shuddering climax deep inside you. For a long, suspended moment, he rested his weight on you, both of you completely breathless, slick with sweat, the only sound the furious, ragged beat of your hearts slowly finding their sync.
He finally eased back, gently collapsing onto the bed beside you, his arm immediately wrapping around your waist to pull you against his side. The scent of sex and warm skin filled the quiet air. He reached up, brushing the damp hair from your forehead, his eyes soft now, filled with a deep, possessive tenderness.
“Did I help you relax, Princess?” he whispered, his voice still shaky from exertion.
You were too spent to reply immediately, only managing to nuzzle your face into his shoulder, breathing in his familiar scent. After a moment, a satisfied sigh escaped your lips.
“I think so,” you mumbled.
He chuckled, pulling you tighter. “Good. And you know, I think I prefer the sound of your screams to any audio clip on your phone.”
He kissed the top of your head, the intense, hungry man of the last twenty minutes replaced by your warm, comforting best friend—though one who now shared a very intense, unforgettable secret with you.
“Now,” he murmured, his thumb rubbing soothing circles on your hip. “The show’s over. Time for cuddles.”
