#dark! sieun

The move was your parents’ idea. A fresh start, closer to their oldest friends. You remembered the Sieuns vaguely from childhood; a single, blurry memory of a quiet, serious-eyed boy who’d hidden behind his mother’s legs. You hadn't thought of him in years.

Now, your mothers were determined to bridge the decade-long gap.

“Sieun-ah, Y/N is like a daughter to me. You look after her at school, understand?” his mother said that first morning, her voice sweet but firm. “Don’t let anything happen to her.”

So you walked to school together in suffocating silence, two islands of introversion adrift in a sea of awkwardness. Sieun didn’t look at you, his hands shoved deep in his pockets, his gaze fixed on the pavement. You matched his pace, the weight of his mother’s request hanging between you.

Then, a whirlwind of energy shattered the quiet.

“Yah! Yeon Sieun! Since when do you walk to school with a girl?”

Suho appeared, slinging a familiar arm around Sieun’s shoulders, but his bright, disarming grin was aimed entirely at you. “Who’s this? Hey, I’m Ahn Suho. Sieun’s best friend.” His friendliness was overwhelming, instantly painting you as his new discovery.

Before Sieun could muster a grunt in reply, another boy approached—softer, shyer. Beomseok. His eyes met yours for a second before darting away, a deep blush creeping up his neck. “Hi,” he mumbled, his voice barely a whisper, shoving Suho playfully in a nervous gesture.

Sieun’s jaw tightened imperceptibly. He saw it all. The way Suho’s smile was a little too possessive for a first meeting. The way Beomseok couldn’t meet your eyes, his shyness radiating a different, more intense kind of interest. A hot, coiling possessiveness ignited in his gut. You were his. His to walk with. His responsibility. His.

“She’s my neighbor,” Sieun said, his voice flat and final, cutting through Suho’s easy chatter. “Let’s go. We’re late.” He didn’t wait for them, starting to walk again, forcing you to follow in his wake.

That was how it began. The four of you became an unlikely, inseparable group. But beneath the surface of shared lunches and study sessions, a silent war was brewing.

Sieun saw every interaction as a threat. When Beomseok, gathering his courage for a week, finally brought you a strawberry milk, his hands trembling slightly—“I just… thought you might like it…”—Sieun’s pen stilled on his homework. He didn’t say a word, but the air around him turned to ice. Later, he “accidentally” knocked the unopened bottle into the trash.

When Suho, ever the physical touch enthusiast, slung his arm around your shoulders after you made a joke, pulling you into his side with a loud laugh, Sieun’s stare was sharp enough to cut glass. He found a reason to need your help with a problem immediately, physically inserting himself between you, his body a barrier.

And when Sieun himself stayed behind after school to help you with a math concept you couldn’t grasp, his patience uncharacteristically endless, his fingers lingering a second too long as he pointed to an equation in your textbook, both Suho and Beomseok watched from the hallway, their expressions a mirror of the same frustrated jealousy.

The competition was unsustainable. They were tripping over each other, their rivalries threatening to scare you away. They needed a new strategy.

The pact was formed in hushed tones behind the school, away from your ever-watchful, unknowing eyes.

“This is stupid,” Suho finally muttered, kicking a pebble. “We’re all going to lose her like this.”

“She’s not a prize to be won,” Beomseok added quietly, though his clenched fists betrayed his calm tone.

Sieun was silent, his dark eyes watching 6them. Finally, he spoke, his voice low and decisive. “No. She’s not a prize. She’s… ours.”

The word hung in the air, radical and inevitable. Ours. It wasn’t about winning individually anymore. It was about claiming you, together.

The plan was Beomseok’s idea. His parents were going overseas for a week. The house would be empty. Perfect.

The invitation was extended casually. A study session. Just the four of you. No distractions.

You agreed easily, innocently. You saw the three most important people in your new life.

You didn’t see the three predators who had just agreed to share their favorite meal.

The click of the door closing was a sound that would echo in your nightmares forever.

Beomseok’s house was enormous, a palace of quiet wealth that felt more like a gilded cage. “Wow, your house is so big.” You breathed, genuinely impressed.You were so distracted, so excited to see his home, that you barely noticed yourself shrugging off your school bag and letting it drop carelessly onto the polished floor of the entryway. A small, forgotten heap of trust and normalcy.

Beosmeok flinched, a faint blush on his cheeks. His mind was a whirlwind of the filthy, obsessive thoughts he'd harbored since you'd become Sieun's neighbor and their group's sole object of affection. “I get that a lot.” He mumbled sheepishly.

“Where are we gonna study?” you asked, still looking around in awe.

“Uhm..how about my room?” Beomseok suggested, his voice a little too high.

Sieun and suho exchanged a glance— a quick, silent communication of predatory intent. They sighed in audible relief. When you blissfully unaware followed them upstairs.

The moment you crossed the threshold into Beomseok’s bedroom, suho turned and clicked the lock on the door. The sound was final. You were making it easy for them, sitting on the edge of the large fluffy bed bouncing slightly. “Wow you got such a big bed.”

But then you felt it. The atmosphere shifted, growing thick and charged. You looked at them— Sieun's dark intense stare, suho's cocky grin that didn't reach his cold eyes, beomseok's nervous excited fidgeting. Your heart began to race. “I think…I should go home.”

You tried to stand up but a hand shoved you back onto the mattress. It was sieun.

“Sieun..?” you asked, shock rendering you immobile for a second. “What are you doing?”

He didn’t answer with words. He answered you by pouncing on you, his body crushing yours, his mouth attaching to your neck in a wet, claiming kiss that was sure to bruise.

“Sieun, what's wrong with you? Get off of me!” You screamed, pushing at his shoulder your pleas turning to pure panic. You looked desperately at suho and Beomseok. “Help me!”

Suho's grin winded. “Oh y/n.” He purred  climbing onto the bed with deliberate grace of a predator.” You don't know how much we love you.” He easily captured you flailing wrists in one strong hand, pinning them above your head. “Now hold still.”

“Suho please I'm your friend!”

“Shh..” He cooed, his other hand groping your breast over your shirt. “This is how friends show they care.”

Beomseok watched from the foot of the bed, his eyes wide, his breathing shallow. He was mesmerized, one hand subtly moving to adjust himself through his pants.

“I love you so much.” sieun murmured against your skin, his voice low and terrifyingly sincere as he unbuttoned your shirt with practiced ease. He tore your bra off, exposing you to the cool air and their hungry gazes.

“Fuck they are even sexier than I thought.” suho groaned, rolling your nipple between his thumb and forefinger, pinching just enough to make you cry. He held your wrists tighter. 

“Look at her, beomseok. Isn't she pretty?” Beomseok could only nod, swallowing thickly.

You kicked out wildly as sieun shoved your skirt up and ripped your panties off. He shoved two thick fingers inside you without warning, the sqeulening sound obscene in the quiet room. You clenched around him, a traitorous wetness spreading despite your terror.

“Open up.” Suho commanded, tapping your jaw.

You clenched your teeth, turning your head away. He grabbed a fistful of your hair, wreching your head back. “I'm asking you nicely. Now c'mon open up.”

Your mouth fell open in a gasp as sieun suddenly replaced his fingers with his cock, sheathing himself inside you in one brutal thrust. Taking the opportunity, suho shoved his length into your mouth, hitting the back of your mouth.

“I swear if I feel your teeth,” he groaned, his hip beginning a shallow rhythm. “I'll knock every one of them out.” 

This was the cue beomseok needed. The mattress dipped as he joined, his eyes zeroing in on your breasts. “So perfect.” He whispered, before leaning down and taking a nipple into his mouth, sucking and laving it with his tongue like a man starved. He moaned against your skin, his own free hand fumbling to undo his pants. He was painfully hard. He grabbed your limp, free hand and wrapped it around his cock, forcing you to jerk him off with clumsy, unwilling strokes.

Sieun was relentless above you, his thrusts deep and punishing. “You feel so good.” He praised, his voice a husky whisper in your ear. His words were a grotesque contrast to his actions. “You were made for me. For us. Taking me so well.” His praise was as much a violation as the act itself.

When he came, spilling inside you with guttural groans,he didn't pull out immediately. He stayed buried within you, as if savoring his claim. 

Suho was already impatient “My turn.” He declared,  pushing a dazed sieun off of you. He positioned himself between your sore, trembling legs.

“No suho please I can't–!” You begged, fresh tears streaming down your face.

“Don't be like that, sweetheart.” He tutted, slapping your inner thigh. The sting made you yelp. “You took sieun just fine. You think you're too good for me?” He didn't wait for an answer. He drove into you, the stretch burning. You cried out, a mix of pain and unwanted pleasure making your head spin. 

“Look at her.” suho laughed, his thrusts brutal and degrading. “Getting wet for it. You're a natural little slut. Aren't you? Just needed us to show you.”

“Shhh it's okay.” Beomseok cooed from beside you, still forcing your hand on his cock. “You're doing so good for us.” His kindness was the most sickening part. He leaned over and littered your chest with kisses and bites, marking you as his own as suho pounded into you.

“Fuck I'm gonna fill you up!” suho grunted, his pace becoming erratic “gonna make sure you remember who you belong to.” He came with a roar, collapsing his weight on you before rolling off, leaving you feeling empty and used.

“Get off of her suho. It's my turn now.” beomseok didn't wait. He simply pushed suho's leg aside and positioned himself. You were so sore, so stretched, you could barely move. 

“Beomseok just stop please–I'm begging you!” you sobbed, hoping for a shred of mercy.

“Why?” he scoffed, his usual shyness gone, replaced by entitled leer. “You took both of them. You think I'm not good enough?” he didn't give you a chance to answer. He pushed inside and you whined, the sensation overwhelming. He was not as rough as suho but his thrusts were eager, desperate. He moaned your name like a prayer, his eyes glued to where your bodies joined.

“Open up.” Sieun was back, his renewed erection tapping against your lips. You looked at him, the boy you'd known since your childhood and fresh tears fell. You shook your head. 

“I said open your fucking mouth.” He snarled, fisting your hair. You obeyed and he shoved himself inside, fucking your mouth with the same possessive intensity as before. “Fuck your mouth feels so good.” He groaned. “So warm. Made for me.”

You were trapped between them–beomseok pounding into you from below, sieun claiming your mouth and suho watching from a chair, stroking himslef, urging them on.

Beomseok came first with a broken cry, spilling inside you. Your own body betrayed you with a second, shuddering orgasm that left you feeling hollow. Sieun followed, his release coating your throat some of it dripping from your lips as he pulled out with a satisfied sigh.

For a moment, there was only the sound of heavy breathing. You lay there, covered in their sweat and spend. A single tear traced path through the mess on your cheek.

You slowly sat up, your entire body screaming in protest. The sight that greeted you was suho, still seated, watching you with a dark, satisfied smile. You tried to stand but your legs gave away and you crumpled to the floor.

Sieun was there instantly, his hands on you  trying to help you. “Don't touch me!” You screamed, your voice raw and broken. 

He flinched as if you'd struck him.” Here sit..I'll.. I'll fix your dress.” He said, his voice soft again, that twisted parody of care returning. He led you back to the bed. His touch burned as he redid your bra and buttoned your shirt. When he tried to pull your panties up  you winced in agony. 

“Sieun ah do you really think she can wear those?”  suho drawled from his chair.” It'll definitely hurt her.”

Sieun hesitated then slowly pulled them down, holding the torn fabric. 

“I'll keep those.” Beomseok said, softly, his voice back to its shy murmur but request was perverse.

Sieun tossed them to him without a word. “You sick bastard.” Suho chuckled, but it was a sound of approval.

Sieun fetched a towel and began to clean between your legs, his movements clinical, like he was mopping up a spill. It was humiliating, a sloppy attempt to erase the evidence of their crime.

“Can you walk now?” sieun asked, his eyes searching yours for something –forgiveness, understanding, love.

You just stared through him.

“Looks like she's too fucked out to even to talk to us.” suho said, standing and walking over. He slapped your cheek lightly.” Hey, answer him. He's talking to you.”

“Is she okay?” beomseok asked, genuine worry in his tone. It was disgusting. 

“Totally fine.” suho answered for you. “Guesz she's just…happy.”

With herculean effort, you stood and walked over toward the door on shaking legs. “Wait y/n!” Sieun's voice was panicked behind you.

He caught up to you easily. “Let's go home together.”

“After what you did to me? No. Never. “

He followed you out, down the stairs and out the front door, a lost puppy. “Let me get your bag.” You ignored him. “Lets take a taxi. You can't walk.”

He was right. You were limping and the walk of shame was compounded by the aching emptiness between your legs. He hailed a cab and bundled you inside, his presence a suffocating shadow.

The ride was silent. When your street came into view, you practically fell out of the car. He was right behind you.

“Get out of my way! You piece of shit!” you spat, all your fury and pain boiling over.

He looked genuinely wounded. “Y/n, i–no, we love you. Don't you see it?”

The words were the final straw. “You're all sick. I hate you. I hate all of you. Don't ever talk to me again.” You shoved past him and stumbled into your house, slamming the door shut on his devastated face.

Sieun stood there frozen. ‘I hate you’ the words echoed, each one knife to his heart. No no you couldn't. You don't understand. They loved you. They'd show you how much they love you. You are theirs. This wasn't rejection, he'd accept. This was a temporary setback.

He loves you, and he would never, ever let you go.