“Mmm… just like that.”

Seulgi whispers, one hand gently threading through your hair. Her hips roll lazily against your face, chasing the pleasure as you switch from broad, flat licks along her entrance to focused, sucking kisses on her swollen clit. Every time you latch on and suckle, her thighs tremble against your palms and a cute little whimper escapes her throat.

You pull back for a moment, just enough to kiss the sensitive skin of her inner thighs. Soft, lingering presses of your lips make her gasp and squirm. You notice she loves this. The way her muscles jump under your mouth, the way her fingers tighten in your hair when you graze your teeth lightly over the spot you just kissed. You trail more kisses along one thigh, then the other, savoring the contrast between her smooth skin and the slick heat of her pussy waiting for you again. When you dive back in, licking a slow stripe from her entrance up to her clit before sucking it between your lips, Seulgi’s back arches off the mattress.

“Ah-! Yes… you’re so good at this.”

Her free hand clutches the sheets beside her.

“Don’t stop… please…”

You can barely believe this is real. You’re just a trainee. An ordinary, barely-debut-material SM trainee living in this tiny one room apartment near the company building. And yet here you are, face buried between the thighs of Kang Seulgi, one of the most talented and beautiful idols of the company. The same Seulgi whose performances you’ve admired from afar, whose voice you’ve listened to walking past a recording room. Now she’s naked in your bed, legs spread wide, letting you worship her like this.

You lose yourself in the rhythm, long licks, quick flicks of your tongue against her clit, gentle sucking, then back to kissing and nipping at her thighs until she’s panting and her hips are grinding more desperately against your face. Her thighs start to squeeze around your head, thick and strong from years of dance, and the pressure only turns you on more. Seulgi’s breathing grows heavier the longer you eat her out, little gasps turning into shaky whimpers.

“You’re… ah… making me feel so good… I didn’t expect you to be this eager, trainee…”

The way she says “trainee” like it’s both a tease and a dirty little secret sends heat rushing through you. It reminds you again how forbidden and insane this is. If anyone at SM found out that a rookie trainee was eating out one of their senior idols in his tiny apartment, your career would probably be over. But right now, with Seulgi’s slick coating your tongue and her soft thighs trembling under your hands, you can’t bring yourself to care. You slide your tongue inside her as deep as you can, fucking her with it in short, hungry thrusts before returning to her clit, sucking harder this time. Seulgi’s moans climb higher. Her fingers tug at your hair to tell you she’s getting close.

“Keep going… just like that…”

You don’t stop. You lick and suck and kiss with single-minded focus, completely lost in the taste of her, the warmth of her skin and the way her thick thighs keep trying to close around your head every time the pleasure spikes. You keep devouring Seulgi’s dripping cunt with hungry, wet strokes of your tongue. Your right hand slides up from her thick thigh, fingers gliding over her smooth skin until you reach her tight, toned abs. Years of relentless dance are carved into firm ridges that flex under your palm as she squirms. At the same time, your left hand moves to her clit, rubbing slow, firm circles over the swollen little nub while your mouth works her folds.

 “Ahh… fuck, that feels so good…”

Her legs, now completely free from your earlier grip, wrap around your back. She locks her ankles together behind you, thighs squeezing your head and shoulders in a powerful, velvety trap that presses your face even deeper into her soaked pussy. You’re completely trapped now…exactly where you want to be. The added pressure makes her pleasure spike. Seulgi arches her back sharply off your mattress, pushing her hips up against your mouth with a desperate whimper. Her chest heaves, breasts bouncing with the motion as she grinds against your tongue and fingers.

You don’t let up. You bury your tongue as deep inside her tight, stuttering hole as it can go, fucking her with it in messy, eager thrusts while your fingers keep rubbing her clit faster. Your other hand leaves her abs and slides higher, cupping one of her soft tits. You squeeze gently, thumb brushing over her hard nipple, rolling it between your fingers as you suck and lick and devour her.

Seulgi’s thighs tremble violently around your head. Her locked legs pull you in tighter, almost suffocating you in the best possible way. Her moans turn into sharp, broken cries.

“I’m-I’m getting so close… don’t stop, please-ahh!”

You can feel it. Her walls clench rhythmically around your tongue, her clit throbs under your fingers, and her entire body starts to tense up like a coiled spring. She’s right on the edge, hips stuttering, thighs squeezing harder, her hand fisting your hair as she grinds shamelessly against your face. Just a few more seconds and she’s going to cum all over your tongue-

Ding-dong

The doorbell cuts through the room like a bucket of ice water. Seulgi freezes mid-moan, her body still arched, thighs still locked around your head. Her chest rises and falls rapidly as she pants, eyes wide with surprise and lingering pleasure. You pull back just enough to breathe, your face slick with her juices, heart pounding. The doorbell rings again. Two sharp, impatient buzzes this time. Seulgi’s legs slowly loosen around you, though she doesn’t let go completely. A small laugh escapes her lips as she looks down at you, cheeks flushed, clearly embarrassed as if she just realized what you and here were doing.

The doorbell rings a third time, longer and more insistent.

You reluctantly pull away from the warm, slick heaven between Seulgi’s thighs with a heavy, regretful sigh. Her legs unlock from behind your back, and you feel her thighs tremble as they slide off your shoulders. Seulgi lets out a soft, disappointed whine, her hips twitching once like she’s still chasing the orgasm you were so close to giving her. Her cheeks are flushed deep pink, chest rising and falling quickly, and she props herself up on her elbows to look at you with big, needy eyes.

“We were so close…”

She murmurs, biting her lower lip. She looks genuinely upset that the pleasure got ripped away right at the edge. You wipe your mouth with the back of your hand, heart still racing.

“I’m sorry… I have to check. Almost no one ever rings my doorbell. It’s either the landlord or…”

You don’t finish the sentence. Maybe you already know.

You climb off the bed and pad barefoot across the small apartment. Your upper body is bare, skin slightly sweaty and glistening from the heat of what you were doing. You take a deep breath and open the door.

There she stands.

Sooyoung

She looks as dangerous and confident as she always does, even in the dim hallway light. Tall black leather over-the-knee boots hug her long legs perfectly, the shiny material catching the light. A long, expensive-looking black coat covers everything else, cinched at the waist with a belt, hinting at whatever she’s wearing underneath. Her hair is down, dark waves framing her sharp, beautiful face.

Your eyes widen in genuine surprise. The expression makes the corner of Sooyoung’s mouth curl into a chuckle. But it’s not warm or amused. It’s dark. The sound sends an icy shiver racing down your spine. You can already tell she’s disappointed by your reaction, and you know from experience that Sooyoung’s disappointment always comes with consequences.

You swallow thickly and bow your head slightly, voice careful and respectful.

“Sooyoung sunbae-nim… good evening.”

She tilts her head, one eyebrow rising.

“Why do you look so surprised?”

Her voice is smooth like honey but edged with steel.

“It’s my birthday today. I decided to give you the honor of spending at least part of it with me. You should be grateful.”

“Th-thank you, sunbae. Really. I’m… I’m honored.”

But Sooyoung’s playful expression shifts in an instant. Her eyes narrow as they rake slowly down your body, taking in your bare chest, the light sheen of sweat, the obvious bulge in your boxers, and the faint glistening wetness around your mouth and chin. You can practically see the gears turning in her head.

You swallow hard again, throat suddenly dry.

You’ve been Sooyoung’s secret “stress relief” for months now. She calls you when she needs to unwind after long schedules, when she wants to dominate someone completely, when she needs a willing mouth and cock to use however she likes. And you’ve learned one very important rule: Sooyoung does not like to share her toys. You still remember the time a female trainee smiled at you for a little too long in the cafeteria. The next day that girl looked pale and avoided eye contact with anyone for a week. You could’ve sworn you saw Sooyoung follow her into the bathroom that afternoon.

Now Sooyoung’s sharp gaze lifts back to your face. She takes one step forward, the leather of her boots creaking softly, and her voice drops to a dangerously sweet tone.

“Tell me, boy…”

She leans in, eyes boring into yours.

“Is there someone else in your apartment right now?”

The question hangs in the air like a blade.

Behind you, in the bedroom, you hear the faint rustle of sheets. Seulgi shifting nervously on your bed, still completely naked.

Sooyoung heard it too and doesn’t wait for your answer. She places one hand on your chest and firmly pushes you backward into your own apartment, stepping inside after you. The heavy door clicks shut behind her with a finality that makes your stomach drop. Her boots thud softly against the floor as she walks past you, the long coat swaying around her legs.

You follow her nervously, heart hammering. You really hope she won’t be too rough on Seulgi. She’s still a senior idol, Red Velvet’s main dancer, someone Sooyoung has known for years. But deep down you know the truth. If Sooyoung is in one of her moods, the consequences will probably land on you instead. You’re the trainee. The toy. The one she can punish without hesitation.

Sooyoung stops at the entrance to your tiny bedroom and freezes for half a second as her eyes land on the bed. Seulgi is still lying there completely naked, thighs slightly spread, skin flushed, her pussy visibly wet and glistening from everything you’d been doing to her. She quickly tries to close her legs and sit up, but it’s far too late.

A predatory smile spreads across Sooyoung’s lips.

“Well, well… look at this.”

She says, voice dripping with mock sweetness.

“Our sweet little Seulgi, spread out like a cheap slut on a random trainee’s bed. How pathetic.”

Seulgi’s face burns bright red. She instinctively tries to cover herself with her hands, but Sooyoung clicks her tongue in disapproval.

“Don’t bother hiding it now. You were clearly enjoying yourself. Legs wide open, dripping all over his face… Did you cum yet, hm? Or did my little toy here leave you desperate and needy like a bitch in heat?”

You stand there silently, cheeks burning. The hypocrisy is almost funny. Sooyoung literally came here tonight to use you for sex on her birthday. But you know better than to say a single word. You keep your mouth shut and your eyes lowered.

“Unnie… it’s not… I just-”

“You just what?”

Sooyoung cuts her off, stepping closer to the bed.

“You just decided to sneak into a trainee’s apartment and let him eat your cunt like a starving whore? How very un-Seulgi of you.”

Sooyoung’s gaze drags slowly over Seulgi’s naked body, lingering on her breasts, her toned stomach, and especially her soaked pussy.

“You look like a toy right now, you know that?”

She continues, tilting her head.

“A pretty little fucktoy laid out on the bed, waiting to be played with.”

Seulgi’s cheeks grow even redder. She looks mortified, but there’s also a visible shiver that runs through her body at Sooyoung’s words. Her thighs press together, not just to hide her pussy. Before Seulgi can form a reply, Sooyoung smiles wider.

“And if you look like a toy…”

She reaches into the duffle bag she brought with her, which you missed until now because of her surprise appearance, and pulls out a thick bundle of soft red rope. You recognize it immediately. The same rope she’s used on you many times during her late-night 2 a.m. visits.

“Then we should treat you like one.”

Seulgi’s mouth falls open in disbelief.

“Unnie… wait-”

Sooyoung turns to you, holding the rope out.

“Tie her hands behind her back. Now.”

You hesitate, glancing between the two women. Your pulse is racing. Sooyoung’s eyes narrow. She opens the bag a little wider, just enough for you to see the coiled black whip resting inside. The silent threat is crystal clear. You swallow hard and climb onto the bed. Seulgi looks up at you with wide, surprised eyes as you gently take her wrists.

“I’m sorry.”

You whisper to her, voice full of apology as you guide her arms behind her back. Her skin is warm and soft under your fingers. You carefully loop the rope around her wrists, tying them together with the same secure but comfortable knots Sooyoung taught you. Not too tight, but tight enough that Seulgi won’t be able to free herself. Seulgi lets out a shaky breath, testing the bonds. Her breasts push forward slightly from the position, and she bites her lip hard, clearly embarrassed… but also undeniably turned on. Sooyoung watches the entire process with dark, satisfied eyes, arms crossed under her chest.

“Good boy.”

She purrs once you finish.

“Now step back. Let noona see her new toy properly.”

You wait as Sooyoung’s eyes rake over Seulgi’s body once more.

“Much better. Happy birthday to me.”

She glances back at you, eyes gleaming with wicked intent. Then, she shrugs off her long black coat, letting it fall to the floor in a heavy heap. Both you and Seulgi can’t help but stare. The shiny black over-the-knee leather boots remain, but now you see the full picture: black fishnet stockings clinging to her long, toned legs, and a tight, glossy black bodysuit hugging every curve of her body. The bodysuit is laced up the front with silver eyelets and black ribbon, plunging deep between her breasts and leaving very little to the imagination. It looks exactly like the kind of thing she’d wear when she wants to remind you exactly who owns you.

Seulgi’s eyes are wide, cheeks still flushed from earlier. You swallow hard, cock twitching in your boxers at the sight of your dominant senior looking like absolute perfection.

Sooyoung smirks, clearly enjoying the way both of you are staring.

“Look at you, Seulgi-ya. All tied up and naked like a desperate little slut. Now you’re going to watch closely and learn how a proper toy treats his owner.”

She snaps her fingers at you.

“Kneel.”

You drop to your knees instantly in front of her. Sooyoung steps closer, then lifts one leg and plants her heavy boot on the edge of the bed right beside Seulgi’s bound body. The movement spreads her thighs, the glossy black bodysuit stretching tight over her core and giving you a perfect, unobstructed view of the crotch panel.

“Be a good toy for me.”

She commands, looking down at you with dark, hungry eyes.

“And show our little audience how it’s done.”

You start exactly where you know she likes it. Worshipping her thighs. You press your lips to the smooth leather of her boot first, then trail slow, reverent kisses upward along her fishnet-covered thigh. Your hands rest lightly on her leg as you kiss and lick the soft skin, sucking gently, nipping just enough to make her hum in approval. Seulgi watches everything in stunned silence, still tied with her hands behind her back, completely naked and unable to look away. You work your way higher, pressing hotter, wetter kisses along the inside of her powerful thigh, breathing in the scent of her skin and the faint leather. Sooyoung’s fingers eventually slide into your hair, and she gives you a single approving tap on the head.

That’s your permission.

With slightly shaky hands, you reach up and carefully pull the crotch of the glossy bodysuit to the side, exposing Sooyoung’s bare, already glistening pussy. She’s perfectly smooth, lips swollen with arousal. You lean in immediately and drag your tongue slowly up her slit, tasting her. A low, satisfied moan leaves Sooyoung’s lips as you begin to eat her out properly. Long, hungry licks are followed by focused sucking on her clit. Just the way she trained you.

“Mmm… that’s it.”

She sighs, rolling her hips lazily against your mouth. One hand stays in your hair, while the other rests on her own thigh.

“Use that trainee tongue like you were born for it.”

Seulgi is breathing heavily, eyes glued to the scene. Her thighs press together uselessly, clearly turned on despite the embarrassment burning on her face. She can see everything. The way your tongue disappears between Sooyoung’s folds. The way Sooyoung’s hips move. The way your face gets wetter with every lick.

Sooyoung glances sideways at her with a wicked smile.

“See that, Seulgi? This is how you please me. This is what good toys do.”

She tugs your hair a little harder, pushing you deeper into her cunt.

“Keep going. Make noona feel good while our pretty new toy watches.”

You moan into Sooyoung’s pussy, the vibration making her thighs tremble slightly as you devour her with everything you have, licking, sucking, and burying your tongue as deep as you can while Seulgi is forced to watch, helplessly turned on and still tied up on your bed.

Sooyoung’s breathing is starting to deepen, her grip in your hair tightening.

“Good boy…Don’t you dare stop until I say so.”

You bury your face deeper between Sooyoung’s thighs, tongue working her slick folds with practiced devotion. Her pussy is noticeably different from Seulgi’s. Sooyoung’s outer lips are fuller, her clit slightly more prominent and swollen, and her taste is stronger, sharper, almost tangy with a hint of sweetness that makes your head spin. Seulgi had been softer, milder, almost delicate on your tongue. Sooyoung tastes like dominance…addictive and overwhelming.

You lap at her hungrily, sucking her clit between your lips before dragging your tongue back down to circle her entrance and push inside. Sooyoung rewards you with a low moan and rolls her hips forward, grinding her wet cunt against your face in slow, demanding circles. Her fingers tighten in your hair even further, pulling you even harder into her heat until your nose is pressed firmly against her mound and you can barely breathe.

“Mmm… that’s it. Use your whole mouth like the eager little toy you are.”

Her eyes stay locked on Seulgi the entire time.

“Look at yourself, Seulgi-ya.”

Sooyoung taunts, grinding harder against your tongue.

“Sitting there tied up, naked and dripping, watching a pathetic trainee eat my pussy like it’s his last meal. You look so fucking desperate. Does it turn you on? Seeing how a real woman gets worshipped?”

Seulgi bites her lip hard, thighs squeezing together uselessly, her cheeks burning crimson. She doesn’t answer, but her breathing is ragged and her nipples are visibly stiff.

You know the truth even as you continue devouring Sooyoung. She’s enjoying your tongue - you can feel her walls beating and taste how wet she’s getting - but this scene isn’t really about pleasure for her. It’s about power. About humiliating both of you at once. Showing Seulgi who the superior woman is and reminding you exactly where you belong: on your knees.

“Poor baby… you want some attention too, don’t you?”

She asks mockingly, still looking straight at Seulgi.

“Do you want head as well?”

Seulgi nods quickly, almost frantically, too embarrassed to speak the words out loud. Her eyes are glassy with need. Sooyoung’s smile turns cruel.

“Use your words, slut. Say it. ‘I need head.’ Five times. Loud and clear.”

Seulgi hesitates for a second, then starts in a small, mortified voice.

“I need head… I need head… I need head… I need head… I need head…”

Her voice cracks on the last one, cheeks burning even hotter. Sooyoung pretends to think about it, tilting her head dramatically while still slowly grinding on your tongue. Then her expression shifts into exaggerated realization.

“Ohhh… you forgot something important, didn’t you?”

She taps the top of your head. You reluctantly pull back just enough to speak, lips and chin glistening with her juices.

“Mistress.”

You say clearly, then immediately dive back in, sucking hard on her clit.

Both women stare at each other in heavy silence for nearly ten long seconds. The only sounds in the room are the wet noises of your tongue on Sooyoung’s pussy.

Finally, in a tiny, humiliated whisper, Seulgi speaks.

“…Mistress.”

Sooyoung’s lips curve into a satisfied, predatory smile. She strokes your hair almost gently while looking down at the bound Red Velvet member.

“Good girl. That wasn’t so hard, was it?”

A few minutes later, the three of you are in the small living room area of your apartment. You’re now completely helpless, sitting almost naked in your only chair. Sooyoung has worked quickly and efficiently, tying your arms behind the backrest and binding your ankles to the chair legs with the same rope. The knots are tight and professional. You can barely wiggle, let alone move. Seulgi stands a few steps away, still completely naked with her wrists bound tightly behind her back. She watches everything with wide, nervous eyes, clearly unsure what Sooyoung has planned next. Sooyoung gives the final knot on your right wrist one last tug, then steps back to admire her work.

“There we go. Nice and secure.”

She turns to Seulgi and points at the floor between your spread legs.

“Kneel.”

Seulgi blinks, confused.

“Unnie…?”

You try to catch her eye and give her an urgent, pleading look.

“Just do it.”

You know resisting Sooyoung right now will only make things worse for both of you. Seulgi hesitates for another second, then slowly lowers herself to her knees in front of you, her bound arms forcing her chest to push forward. The position makes her look incredibly vulnerable. Sooyoung lets out a soft, mocking laugh as she steps behind Seulgi. She leans down, one hand gently patting the top of Seulgi’s head like she’s praising a confused puppy.

“Aww, what’s wrong, slut? Did you think I was going to let you get head? Or that you’d be the one giving it?”

Sooyoung’s voice drips with fake sympathy.

“I didn’t say any of that. And you didn’t ask properly either. Tough luck.”

Seulgi’s mouth opens to protest, cheeks burning with fresh embarrassment. Before she can speak, Sooyoung hooks two fingers into the waistband of your boxers and yanks them down just enough for your aching cock to spring free right in front of Seulgi’s face. Seulgi’s eyes widen. Her protest dies instantly as she stares at your cock for the first time, lips parted in surprise. For a brief moment she seems distracted. Sooyoung doesn’t give her any time to admire your cock though. Her hand that had been resting on Seulgi’s head suddenly tightens into a fist, grabbing a thick handful of Seulgi’s dark hair. Seulgi yelps in pain as Sooyoung forcefully pushes her head forward.

“Open.”

Seulgi barely has time to gasp before Sooyoung shoves her mouth down onto your cock. The warm, wet heat of her mouth engulfs you, taking nearly half your length before she gags softly around you.

“Mmmph-!”

Seulgi’s muffled cry vibrates deliciously around your shaft. Sooyoung holds her there firmly, not letting her pull back.

“That’s it. Take it. Use that pretty mouth like the desperate little toy you are.”

You groan, unable to move your hips or hands at all. You’re completely at their mercy, forced to sit there and feel every twitch of Seulgi’s tongue and mouth as Sooyoung controls the rhythm, slowly pushing her head up and down on your cock. Seulgi’s eyes water, but she doesn’t fight it. Her bound hands twitch uselessly behind her back while Sooyoung continues to guide her, forcing her to take you deeper with every push.

“Good girl.”

Sooyoung purrs, looking straight into your eyes with a wicked smile.

“Look how well our little princess sucks cock when she’s properly motivated.”

She keeps one hand fisted in Seulgi’s hair, using her mouth like a toy while you remain helplessly tied to the chair, throbbing between Seulgi’s soft, reluctant lips. Sooyoung tightens her grip and starts fucking her face onto your cock with a steady, harsh rhythm.

Up and down. Up and down.

She controls every motion, forcing Seulgi’s warm, wet mouth to slide along your throbbing length again and again. She never pushes deep enough for you to breach her throat, always stopping just before the head hits the back, keeping you right on that agonizing edge of frustration.

“Fuck… look at you two.”

Sooyoung laughs, voice thick with cruel delight.

“My two pretty little toys falling apart so easily.”

Seulgi’s mouth is a complete mess. Her lips are stretched tight around your shaft, spit already pouring from the corners of her mouth in thick, shiny strands. Every time Sooyoung shoves her head down, more saliva drools messily down her chin, dripping onto her bare breasts, her thighs, and even pooling on the floor between her knees. Wet, obscene sounds fill the room - gluck, gluck, gluck - as Sooyoung uses her mouth like a fleshlight. Spit bubbles form and pop around the base of your cock every time Seulgi’s lips meet your skin. Her eyes are glassy, watering, her cheeks hollowed out as she struggles to breathe through her nose. Her bound hands twitch helplessly behind her back, shoulders straining against the rope.

You’re in even worse shape. Completely tied to the chair, you can’t thrust, can’t grab her head, can’t do anything except sit there and take the torturous pleasure Sooyoung is forcing on you. Every slide of Seulgi’s soft tongue and tight lips brings you closer and closer to the edge… but Sooyoung is an expert at denial. She keeps the pace rough and fast enough to drive you insane, yet never gives you that final deep push into Seulgi’s throat that would finally let you cum.

“Poor trainee.”

Sooyoung mocks, glancing at your desperate face while she keeps pumping Seulgi’s head.

“So close, aren’t you? I can tell how hard you’re throbbing in her mouth. But you’re not allowed to cum yet. Not until I say so. This is about punishing both of you, not rewarding you.”

She suddenly pushes Seulgi down a little harder and holds her there for a few long seconds, grinding her face against your pelvis while Seulgi makes wet, choking whimpers around your cock.

Seulgi’s drool is everywhere now. It coats your entire shaft, runs down your balls, and keeps dripping onto her own thighs. Her face is flushed dark red, tears of effort and humiliation clinging to her lashes. Sooyoung leans down closer, her breath hot against your ear while her other hand strokes Seulgi’s hair almost gently.

“Look at her, baby. A precious senior idol reduced to a sloppy, drooling cocksleeve for a pathetic little rookie like you. And you…”

She chuckles darkly.

“You’re about to lose your mind because I won’t even let you fuck her throat properly. How does it feel knowing your orgasm belongs to me?”

You groan again, hips straining uselessly against the ropes, every muscle tight as you fight the overwhelming urge to cum. The denial is driving you crazy. Sooyoung’s rough, controlling pace combined with Seulgi’s warm, spit-soaked mouth is pure torture. Seulgi whimpers again, the sound vibrating around your cock as more spit bubbles and drips down her chin.

Sooyoung smiles like a predator watching you being unable to answer her question.

“Aww, listen to those cute little sounds she’s making. Such a good little mouth whore, isn’t she? Keep sucking, Seulgi-ya. Make my toy suffer.”

She picks up the pace again, brutally fucking Seulgi’s face onto your cock while both of you remain completely at her mercy - one ruined and drooling, the other helplessly edged and denied.

Sooyoung’s eyes sparkle with pure sadistic joy as she watches you both struggle. She keeps the evil rhythm going for several more torturous minutes, shoving Seulgi’s drooling mouth up and down your cock with merciless force. The wet, filthy gluck-gluck-gluck sounds echo through your small living room as more spit cascades down Seulgi’s chin and onto her tits and thighs. Sooyoung’s dirty talk never stops, each word laced with cruel amusement.

“That’s it… choke on trainee cock like the needy slut you are, Seulgi-ya. Look at all that mess you’re making. You’re literally drooling all over his balls. Pathetic.”

You’re trembling in the chair, every muscle locked tight against the ropes. The constant stimulation without any hope of release is driving you insane. Your cock feels like it’s on fire, swollen and hypersensitive inside Seulgi’s ruined mouth.

Then, without any warning, Sooyoung yanks Seulgi’s head back hard. Your cock pops free, glistening with thick strings of her saliva. The sudden absence of heat makes you groan loudly, hips jerking uselessly against your bonds. For one terrifying, blissful second you think you’re going to cum anyway, your cock twitching violently in the air, pulsing, leaking, right on the cliff’s edge.

But the orgasm fades cruelly, leaving you throbbing and denied once again. Seulgi gasps and coughs, spit dripping from her lips as she desperately tries to catch her breath. Her eyes are hazy, her chest heaving. But she doesn’t get the chance to recover. Sooyoung moves behind her, sliding two fingers into each corner of Seulgi’s mouth and hooking them firmly, stretching her lips wide open in a lewd, grotesque “O” shape. The sight is so degrading it makes your stomach twist with a mix of intense arousal and disbelief, like Sooyoung is handling a mindless animal instead of one of SM’s top idols.

Seulgi makes a garbled, surprised noise. Without hesitation, Sooyoung forces that stretched-open mouth straight back down onto your cock, all the way in one single, brutal push. Your entire length disappears between Seulgi’s lips until her nose is pressed flush against your pelvis and her throat bulges around you. The tight, rippling heat of her throat swallows you completely.

“Fuuuck-!”

You choke out, head spinning from the sudden overwhelming pleasure. Sooyoung holds Seulgi there, both hands still hooked in her mouth, keeping her impaled on your cock.

“Hold your breath, toy.”

She says calmly, almost conversationally, though you can barely hear her over the roaring in your ears.

“Good girls don’t need air when they’re serving cock.”

Seulgi’s throat jerks violently around your shaft, muscles rippling and squeezing as her body instinctively fights for oxygen. Her eyes widen in panic, tears spilling down her cheeks. You can feel every desperate flutter and gag around your cock, but Sooyoung doesn’t budge an inch.

You’re completely helpless, tied to the chair, unable to pull away or help her. The overwhelming sensation of Seulgi’s spasming throat is pure ecstasy, yet somehow still not quite enough to push you over the edge. Sooyoung’s expert edging has left you trapped in agonizing limbo.

Seconds drag on.

Seulgi’s struggles grow weaker. Her bound hands twitch behind her back. Her eyelids start to flutter, her vision clearly going hazy as she slowly loses consciousness, still stuffed full of your cock. Sooyoung watches with dark, satisfied eyes, a twisted smile on her lips as she keeps Seulgi pinned there.

“That’s it… nice and deep. Let him feel how tight your throat gets when you’re about to pass out.”

Sooyoung holds Seulgi down for a few more torturous seconds, watching with dark fascination as the younger girl’s body goes completely limp on your cock. Seulgi’s throat stops trembling. Her eyes roll back and flutter shut as she finally passes out, still impaled deep on your throbbing length.

Sooyoung finally pulls her head back. Your cock springs free again, glistening with thick spit. For a terrifying moment you think something’s wrong. Your heart spikes with worry as Seulgi slumps forward, completely unconscious. Sooyoung calmly leans down, two fingers pressed to the side of Seulgi’s neck. After a couple of seconds she nods.

“She’s fine. Just went out for a little nap.”

She says casually, as if she didn’t just choke her fellow idol unconscious on your dick.

“Cute.”

Sooyoung manhandles Seulgi’s limp body with surprising strength, lifting her off the floor. She drapes Seulgi over your lap, so the unconscious woman is straddling you, her soft breasts pressing against your chest and her chin resting on your shoulder. Seulgi’s warm, unconscious breathing tickles your neck. Sooyoung grabs more rope and starts looping it around Seulgi’s waist, then around your torso and the back of the chair, binding the two of you together. She doesn’t tighten everything yet though.

The moment Seulgi’s weight settles on you, her slick, puffy pussy lips drag right along the top of your aching cock. You moan helplessly at the hot, slippery contact, your shaft trapped between her soaked folds and your own stomach.

Sooyoung chuckles at your desperate sound.

“Aww, listen to you moaning like a bitch just because her cunt is touching you.”

She grips Seulgi’s hips with both hands and lifts her slightly. Then she reaches between your bodies, wraps her fingers around your cock, and lines the head up with Seulgi’s dripping entrance.

Slowly, torturously, Sooyoung lowers Seulgi onto you. Your head falls back against the chair with a broken groan as inch after inch of your cock sinks into Seulgi’s tight heat. Even unconscious, her pussy clenches weakly around you, sucking you deeper. The feeling is overwhelming. She’s hot, wet, dripping, and impossibly snug. Sooyoung doesn’t stop until Seulgi is fully seated on your cock, every inch buried inside her. Then she quickly tightens all the ropes, cinching them hard so neither of you can move even a centimeter. Seulgi is now helplessly impaled on you, tied chest-to-chest, her bound arms still behind her back, completely at Sooyoung’s mercy.

Sooyoung steps back to admire her work, a satisfied smirk on her face.

“Perfect. Now you two are stuck together like the horny little animals you are.”

She suddenly turns and starts looking around your small living room, eyes scanning the shelves and corners.

“Hmm… I saw it somewhere over here…”

She mumbles to herself.

Your eyes follow her gaze.

She stops in front of the small table near your couch and picks up the official Red Velvet light stick. Sooyoung weighs it in her hand, testing its size and shape with a wicked little smile.

You still don’t fully understand what she’s planning as she turns it on. Until she reaches back into her bag, pulls out another length of rope, and starts tying it around her own waist like a harness. She carefully positions the thick light stick so it juts forward from between her legs, securing it tightly with expert knots until it’s standing out like a rigid, glowing strap-on. The Red Velvet light stick - Seulgi’s own group’s official merch - is now strapped to Sooyoung’s hips, ready to be used.

Sooyoung picks up a small bottle of lube from her bag as well and generously pours the clear, slick liquid all over the thick light stick. She strokes it slowly with her hand, coating all of it until the glowing toy shines at the handle. The sight alone makes your cock twitch hard inside Seulgi’s tight pussy.

“Time to play with my new favorite toy.”

Sooyoung steps closer and delivers a sharp slap to Seulgi’s cheek.

Smack

Seulgi’s head jolts, but she doesn’t wake.

Smack

Smack

On the third slap, Seulgi gasps sharply and regains consciousness with a broken whimper. Her eyes flutter open, hazy and confused. The first thing she feels is your thick cock buried deep inside her pussy, stretching her, filling her completely while she’s tied chest-to-chest with you.

“Ah… hah…”

She breathes shakily, shifting to get a bit more comfortable. The unfamiliar fullness makes her whimper again, but there’s a needy little edge to the sound. Her walls tremble around you. You open your mouth, wanting to apologize - for everything, for not stopping this, for being the reason she’s in this position - but no words come out. You have no idea what you’d even be sorry for at this point.

Seulgi suddenly freezes as Sooyoung steps right behind her. Sooyoung’s hands grip Seulgi’s plump ass cheeks and spread them wide apart, exposing her tight little hole.

“U-Unnie…”

“Shhh, baby.”

Sooyoung coos in her sweetest voice, gently rubbing circles on Seulgi’s lower back.

“Just relax for me. You’re going to take it so well. Be a good girl for unnie.”

Seulgi barely has time to breathe before Sooyoung presses the thick, lubed-up tip of the light stick against her asshole and starts pushing in. Seulgi’s eyes widen. A long, broken gasp tears from her throat as the glowing toy stretches her tight ring of muscle. Inch by inch, Sooyoung feeds the makeshift strap-on deeper into Seulgi’s ass.

You feel it immediately. The pressure is intense. The hard, unyielding shape of the light stick presses against your cock through the thin wall separating Seulgi’s pussy and ass. The sensation is overwhelming. You groan deeply as Seulgi’s cunt squeezes even tighter around you from the dual intrusion.

“Nngh-! Ahh… it’s… too much…”

Seulgi whimpers, unable to form a proper sentence. Her body trembles between you and Sooyoung, soft moans and gasps spilling nonstop from her lips.

Sooyoung keeps going until most of the thick light stick is buried in Seulgi’s ass. Then she slowly pulls back until only the tip remains inside, before pushing in again with a smooth, shallow thrust.

Seulgi loses her mind almost instantly.

Every slow thrust from Sooyoung pushes Seulgi’s body forward, forcing her soaked pussy to glide and grind along the entire length of your cock. Then, when Sooyoung pulls back, Seulgi’s weight settles deeper onto you again. The rhythm is destructive for the both of you. You’re completely helpless, tied tightly to the chair, unable to thrust or pull away. All you can do is feel every single movement as both of Seulgi’s holes are used at the same time. Her pussy flutters and clenches around you in irregular intervals while the light stick drags against you through her ass.

Seulgi is a complete mess. Her face is buried against your neck, hot breath and drool soaking your skin as she moans and whimpers incoherently.

“Hah-ahh-unnie-fuuuck-”

She can’t even form real words anymore. Her bound body shakes with every thrust, tits pressed tight against your chest. Sooyoung laughs at her state, gripping Seulgi’s hips as she picks up the pace just a little.

“That’s it… feel how full you are, Seulgi-ya? Stuffed in both holes like a proper little fucktoy. Your own group’s light stick is fucking your ass while a pathetic trainee fills your cunt. How does it feel, baby?”

Seulgi can only answer with a broken, high-pitched moan as another thrust pushes her forward again, dragging her dripping pussy along your cock.

You’re both completely wrecked. Seulgi loses herself between the dual penetration, and you are forced to endure every clench, every slide, every whimper without being able to move an inch.

Sooyoung’s eyes gleam with pure satisfaction as she fucks Seulgi’s ass with the glowing light stick, using the motion to fuck both of you at once.

As she continues to ruin Seulgi’s ass, she grips Seulgi’s hips tighter and starts fucking her ass with deeper, more relentless strokes using the thick glowing light stick. Every thrust forces Seulgi’s body forward, sliding her soaked pussy up and down your cock in an overwhelming rhythm. The dual pressure inside her - your throbbing cock stretching her cunt and the hard, unyielding light stick filling her ass - quickly pushes Seulgi over the edge again and again.

“Ah-! Ahh-fuck-!”

Seulgi cums hard for the first time, her walls clamping down around you like a vice as her entire body shakes like an earthquake. Her pussy gushes, soaking your cock and balls with fresh wetness. Sooyoung laughs and keeps thrusting straight through the orgasm, not giving her any mercy.

She cums again barely a minute later.

Then again.

And again.

Each orgasm is more intense than the last. Seulgi’s moans grow louder at first - desperate, broken cries that echo through your small apartment - but gradually they start to fade. Her voice cracks. Her head falls heavier against your shoulder. Eventually the loud moans turn into weak, breathless whimpers… then nothing at all.

Now she’s just a limp, ruined doll in your lap. Her body is completely slack against you, head lolling on your shoulder, hot breath barely brushing your neck. The only signs that she’s still conscious are the occasional, uncontrollable tremors that ripple through her when another small orgasm rolls through her exhausted body. Her pussy continues to flutter and clench weakly around your cock, milking you with every tiny wave of pleasure, but she can’t even moan anymore. She’s gone completely limp, a warm, dripping, overstimulated mess tied to your chest.

You’re barely holding on yourself. Your cock is buried to the hilt inside her spasming heat, constantly stimulated by every thrust of the light stick pressing against you through her thin inner wall. The pleasure is overwhelming. Every time Sooyoung drives the glowing toy deeper into Seulgi’s ass, you feel it drag along your shaft. Your balls are tight. Your entire body strains against the ropes as you fight the desperate urge to cum. You know what will happen if you do. Sooyoung’s punishments are creative and cruel. You bite the inside of your cheek hard, trying to focus on anything except the mind-melting sensation of Seulgi’s ruined hole wrapped around you.

“Look at her.”

Sooyoung purrs, still fucking Seulgi’s ass with steady, powerful strokes.

“Our strong, talented Seulgi has been reduced to a limp little fucktoy. She’s not even making sounds anymore… just cuming silently like a broken doll.”

She slaps Seulgi’s ass, making the older girl’s body jolt weakly on your cock. Another tiny orgasm trembles through Seulgi, her pussy giving one last pathetic squeeze around you. You groan through gritted teeth, sweat dripping down your temples. You can feel Seulgi slipping again. Not from lack of air this time, but from sheer, overwhelming pleasure. Her breathing is shallow and slow against your neck. Her body twitches faintly every few seconds as another soft wave of orgasm washes through her exhausted system.

Sooyoung leans in close, her lips brushing your ear while she continues to wreck Seulgi’s ass with the light stick.

“You’re doing so well holding it in, trainee.”

She whispers mockingly.

“I can feel how close you are. How badly you want to fill her up. But you won’t cum until I allow it… right?”

She gives a particularly deep thrust with the light stick to emphasize her point, forcing Seulgi’s limp body down hard onto your cock. Seulgi lets out one tiny, almost inaudible whimper before falling completely silent again, lost in pleasure-induced haze.

Sooyoung smiles wickedly, eyes gleaming as she watches you struggle. She continues to fuck Seulgi’s ass with deep, powerful thrusts, each stroke forcing Seulgi’s limp body to slide up and down your cock. The constant pressure, the way Seulgi’s pussy flutters and clenches around you with every tiny aftershock of her endless orgasms…it’s too much. Your balls are drawn up tight, your entire body shaking against the ropes as you fight with everything you have.

Finally, you can’t hold it anymore.

“I’m-I’m gonna cum-!”

You gasp desperately, almost right there on the edge.

“Sooyoung sunbae-Mistress-I can’t hold it any longer, please-!”

Sooyoung’s eyes narrow dangerously. She gives one final, brutally hard thrust into Seulgi’s ass, burying the light stick as deep as it will go and holding it there.

You feel the devastating pressure against your cock through Seulgi’s walls… and then nothing.

Sooyoung stops completely.

Your orgasm teeters right on the edge for a terrifying second, so close you can almost taste it, before it cruelly fades away again. You groan in pure frustration, cock twitching helplessly inside Seulgi’s soaked, twitching pussy. Disappointment floods you, but at least you didn’t cum without permission. You know the punishment for that would have been far worse.

Sooyoung slowly pulls the lightstick out of Seulgi’s ass slowly. She unties the ropes holding Seulgi to you, then easily lifts the completely limp, unconscious girl off your cock. A thick trail of her juices drips from Seulgi’s pussy onto your lap as Sooyoung carries her over to the couch and lays her down gently, arranging her exhausted body like a broken doll.

Then Sooyoung turns back to you.

Your eyes instinctively drop to the obscene glowing lightstick still strapped to her hips. You quickly look back up at her face, but she noticed.

Sooyoung smirks.

“Maybe next time, baby.”

She purrs, voice dripping with mock affection.

She unties the makeshift harness and tosses the lightstick aside. Then she steps forward, plants one shiny black leather boot right on the edge of the chair between your spread legs, the sole dangerously close to your throbbing, denied cock.

“Tuck your chin in.”

You obey instantly, pressing your chin tightly against your chest.

Sooyoung smiles and pushes hard with her boot. The front legs of the chair lift off the ground, tipping backward in slow motion. For a split second you’re weightless, then the chair crashes down onto its back with a loud thud, leaving you lying flat on the floor, still completely tied to it.

Sooyoung throws her head back and laughs.

“Look at you. Tied up like a useless piece of furniture.”

She stands over you for a moment, enjoying the sight, then reaches down and pulls the crotch of her glossy black bodysuit to the side again, exposing her dripping wet pussy.

Without another word, she steps over your face and lowers herself onto you. Her wet cunt presses down firmly against your mouth and nose as she settles her full weight on your face. One hand slides into your hair, gripping it tightly for leverage.

“Make me cum, trainee. And you’d better do a good job. Use that tongue like your life depends on it.”

She starts grinding slowly, smearing her juices all over your face as she waits for you to start worshipping her properly.

You do everything you possibly can with what little mobility you have. Tied flat on your back to the overturned chair, arms bound behind you and legs spread, you can barely move your head. Sooyoung’s weight presses down heavily on your face, smothering you in the wet heat of her pussy. You strain your neck, tongue working desperately with long, broad licks through her slick folds, sucking on her swollen clit, pushing as deep inside her as you can manage.

It’s hard. Exhausting. Your jaw quickly starts to ache and your lungs burn every time she grinds down harder, cutting off your air. But you don’t stop. You lick, suck, and worship her cunt like your entire purpose in life is to make her cum.

“Mmm… not bad.”

Sooyoung hums above you, slowly rolling her hips. One hand stays tangled in your hair, occasionally tugging you harder against her.

“Keep going, toy. Put that trainee tongue to work.”

Minutes drag by. Your world narrows down to nothing but the taste of her, the slick sounds of your mouth, and the growing pressure of her thighs around your head. But you can feel her getting closer. Her breathing is getting sharper. Her hips move faster. Her pussy drips more onto your tongue.

Finally, after what feels like an eternity, Sooyoung tenses above you. Her thighs clamp tightly around your face as she grinds down hard, smothering you completely. A low, satisfied groan escapes her lips as she cums, her pussy pulsing and gushing against your mouth. You keep licking her through it, drawing out every last tremor until she finally relaxes with a deep, content sigh.

Sooyoung stays seated on your face for a few more seconds, catching her breath, before she slowly lifts herself off you. Your face is soaked. Your chin, cheeks, and nose are covered in her juices.

She stands up, stretching lazily like a satisfied cat, then starts gathering her things. She picks up the rope, the bottle of lube and neatly coils everything before slipping them back into her bag. Finally, she puts on her long black coat, tying the belt around her waist.

You wait, heart still racing, expecting her to untie you like she usually does after she’s finished playing with you. But she doesn’t even glance in your direction.

As she walks toward the door, panic spikes in your chest.

“Sooyoung sunbae… wait-! Aren’t you going to untie me?”

Sooyoung stops at the door and looks back at you with a cruel little smile. Her eyes drag slowly over your helpless, tied-up body and your painfully hard, denied cock.

“Aww, poor little trainee.”

She coos mockingly.

“Did you really think I was going to let you off that easy after you let Seulgi sneak into your apartment behind my back? Consider this part of your punishment. Maybe next time you’ll remember who you belong to.”

You glance desperately toward the couch where Seulgi is still lying completely unconscious, limp and exhausted from the brutal overstimulation.

If Sooyoung leaves you like this, you’ll have to wait until Seulgi wakes up… whenever that is. Then the two of you will have to figure out how to untie each other while she’s still bound and you’re stuck to this damn chair on the floor.

Sooyoung gives you one last degrading smirk.

“Try not to cum untouched while you’re lying there thinking about me, okay?”

With that, she opens the door, steps out into the hallway, and pulls it shut behind her.

Click

The lock engages.

You’re left completely alone, tied helplessly on your back to the overturned chair, cock still aching and leaking, face covered in Sooyoung’s cum, with a passed-out naked Seulgi on your couch.