Pairing: Sunghoon x Reader
Genre: Dark Romance, Angst, Smut, Toxic Love
Warnings:🔹 Toxic Relationship Dynamics (Possessiveness, Jealousy, Manipulation), Explicit Smut (Degradation, Rough Sex, Overstimulation), Breakup & Emotional Turmoil (Heavy Angst, Mutual Destruction), Phone Call Breakup (Sunghoon taking full control over OC's relationship), Slight Non-Con Elements (Reader hesitating but giving in), Mentions of Infidelity (Emotional & Physical)
The room felt suffocating. Not because it was small, not because the air was thick with tension, but because he was standing there—so close, yet unbearably out of reach.
Sunghoon’s expression was unreadable, his usual cold stare even more distant tonight. His hands were clenched at his sides like he was forcing himself to stand still. Like if he moved even an inch, he’d break. Or maybe… if he stayed any longer, he’d change his mind.
And you knew he wouldn’t allow himself that weakness.
"Just say it," you whispered, hating how weak your voice sounded.
He exhaled sharply. "I can't do this anymore."
There it was. The dagger you had been bracing for. And yet, it still carved through your ribs like your heart was made of paper.
You swallowed, hands curling into fists. "You're lying."
His jaw tightened. His lips parted, then hesitated. You could see the war behind his eyes, but you already knew the outcome.
He had already made up his mind.
"We’re not good for each other."
A cruel joke. A hollow excuse.
You let out a sharp breath, bitter laughter bubbling up despite the ache clawing at your chest. "We were good enough before."
Before the fights. Before the sleepless nights. Before the love turned into a battlefield where neither of you could surrender first.
Sunghoon’s gaze flickered, but he didn't look at you. He couldn't. "People change."
"So change back." The words slipped out, desperate, breaking. Your fingers ached to reach for him, to pull him back into you, to rewind time to when love didn’t feel like a losing game.
For the briefest second, his eyes met yours.
Then it was gone. The wall slammed back up. "Goodbye, Y/N."
Your heart lurched, panic clawing up your throat as you choked out, "Don't—please don’t do this."
But his footsteps didn’t falter.
No looking back. No hesitation.
And just like that, he walked out.
And you stood there, drowning in the ruins of everything you had built together.
Love had never been kind. But this? This was cruelty.
Years since Sunghoon had walked away. Years since you had forced yourself to move on, piece by shattered piece.
And for a while, you convinced yourself you had.
Until tonight. Until you felt his eyes burning into you from across the club.
The music was deafening, bodies moving around you in a blur of heat and sweat, but the only thing you could feel was him—standing there, watching.
Jaw clenched. Fingers gripping his drink like he wanted to shatter the glass.
It rolled off him in waves, thick and suffocating. And all because of him—the man currently leaning too close, whispering something in your ear that you weren’t even hearing anymore.
Not when every nerve in your body was tuned into the man who once knew you better than anyone. The man who had ruined you for anyone else.
Then suddenly—a firm grip on your wrist. A sharp pull. The world tilting.
"We're leaving." Sunghoon’s voice was low, possessive, deadly.
The man beside you scoffed, stepping forward. "Hey, man—"
One look. That’s all it took for the guy to hesitate, stepping back like he sensed something dangerous.
Sunghoon didn’t even glance at him again. His fingers tightened around your wrist, dragging you through the crowd, past the pulsing lights, until the cool air hit your skin and the night swallowed you whole.
"What the hell is your problem?" you snapped, yanking your arm away once you were outside.
Sunghoon turned, and the way he was looking at you—like he was barely restraining himself—knocked the air from your lungs.
Your breath hitched. "So? You lost the right to care, remember?"
His jaw ticked. His eyes flickered down to your lips, then lower, lingering on the way your dress clung to your body.
A blur of movement. Hands grabbing. Back hitting cold metal.
He kissed you like he was starving.
It wasn’t soft. It wasn’t careful.
It was desperate. Rough. Years of frustration, of jealousy, of regret, poured into every clash of lips, every bite, every possessive pull of your hair.
His hands gripped, explored, claimed—running up your thighs, hiking your dress higher, higher—until he was lifting you onto the hood of his car, stepping between your legs like he belonged there.
"Tell me to stop," he rasped against your lips, voice wrecked, hands shaking as they slid under your dress. "Tell me you've forgotten me."
But when he dragged his teeth along your jaw, when his fingers dipped lower, teasing, taunting, forcing out a sound that was more needy than you wanted to admit—
You hadn’t moved on at all.
The moment your moan slipped out, Sunghoon lost it.
His lips crushed against yours again, teeth grazing, tongue claiming, hands gripping your thighs so tightly you knew there would be bruises. His fingers curled under your dress, yanking the fabric up to your waist, exposing more of you to the cool night air.
His breath was ragged as he pulled back just enough to growl, "I don’t care how many years it’s been. This? This is still mine."
You gasped as he pressed forward, grinding against you, his clothed hardness pressing right where you needed him most. The friction sent a jolt of pleasure straight to your core, making you arch against him.
He exhaled sharply, forehead dropping against yours. "Say it again."
Your fingers tangled in his shirt, dragging him closer as you rolled your hips against his, a shameless whimper leaving your lips. "Sunghoon."
His name sounded so wrecked coming from your mouth, so full of need, that a broken groan ripped from his throat. His control snapped.
A flurry of movement—he spun you around, pressing your front against the car, one hand pushing down on your back, keeping you pinned while the other yanked at your underwear, tearing the lace with zero patience.
"You don’t get to act like you’ve moved on," he rasped against your ear, pressing his chest to your back, his hand sliding between your thighs, fingers dragging along your slick folds. "Not when you're this fucking wet for me."
You shuddered, gasping as his fingers teased, barely dipping in, spreading you open just to prove how soaked you were.
"I bet he never got you like this," Sunghoon taunted, pressing a kiss behind your ear. "Did he ever make you drip just from a kiss? From just hearing my voice?"
Your nails scratched against the hood of his car as he slid two fingers inside you, stretching, curling, pressing against that spot that made your legs weak.
His free hand caught your throat, tilting your head back so his lips could skim over your jaw. "Please, what?"
Wanted to hear you admit that no one had ever made you feel like this.
And fuck—you were so close to breaking.
He pumped his fingers faster, curling them just right, rubbing his palm against your clit until you were gasping, writhing, barely holding yourself up against the car.
"I could make you come just like this," he whispered darkly, "but you don’t deserve it yet."
Before you could protest, he pulled away completely, leaving you aching, empty, desperate.
A sharp gasp left you as he flipped you around again, hooking his hands under your thighs, lifting you effortlessly onto the car hood.
His eyes were wild, dark, filled with something dangerous as he unzipped his jeans, pulling himself free. Thick, hard, already leaking.
He grabbed your thighs, yanking you forward until your core was aligned with him.
"Gonna take me like a good girl, or do I have to remind you who you belong to?"
Your breath hitched. "I never forgot."
With a rough thrust, he buried himself inside you, stretching you to the point of pain, to the point where all you could do was sob out his name.
"That’s it," he groaned, head dropping to your shoulder as he stilled for a moment, letting you adjust. "So fucking tight. You missed this, didn’t you?"
You could barely think, barely breathe. But when he pulled back, just to slam into you again, harder, deeper, a shameless cry ripped from your throat.
"Say it." His grip on your hips was bruising as he thrust into you again, setting a brutal rhythm. "Say you fucking missed this."
You were trembling, nails digging into his arms. "I missed you. I missed you so much, Sunghoon—"
Whatever restraint he had left snapped, and he fucked you like he was trying to make up for every second you had been apart.
Each thrust was punishing, every drag of his cock against your walls pulling out filthy, choked moans that he swallowed with his mouth. His tongue was everywhere—your lips, your jaw, your throat, marking you up, ruining you all over again.
"No one else gets to have you," he growled against your skin. "No one. Ever again."
Your body clenched around him, the heat in your stomach coiling tighter, higher—
"I can feel you, baby," he panted, thrusts growing erratic. "You gonna come for me? Let me feel how much you missed me?"
Your nails raked down his back, legs wrapping tighter around him. "I—fuck, Sunghoon, I’m—"
And then—he reached between you, rubbing quick, relentless circles against your clit.
The orgasm crashed into you so hard your vision went white, your body spasming as you clenched around him.
Sunghoon groaned loudly, hips stuttering, and then he was gone too—burying himself deep, spilling inside you with a wrecked, desperate growl of your name.
For a while, the only thing that existed was the sound of ragged breathing, of your pounding heartbeats trying to slow down.
Sunghoon pressed his forehead against yours, whispering your name like it was a prayer, like he was terrified to lose you again.
And maybe—just maybe—this time, he wouldn't.
The heat between you still lingered as you both tried to catch your breath, bodies still tangled together on the hood of his car. Your skin was sticky, thighs still trembling from how hard he had taken you, how deeply he had ruined you.
Sunghoon was still buried inside you, still impossibly hard, like he wasn’t done proving his point. His forehead rested against yours, dark strands of hair falling over his eyes as he let out a shaky exhale. He should have been satisfied. He should have felt victorious.
But then, your phone buzzed.
The soft glow of the screen lit up, and Sunghoon's gaze flickered down.
And just like that—his entire body stiffened.
The playful haze from before evaporated the second he saw what was on your screen.
A picture of you and another guy—laughing, standing too close, his arm slung over your shoulder like he had every right to be touching you like that.
Sunghoon's grip on your waist tightened dangerously.
Your breath hitched. "Sunghoon?"
Instead, his fingers curled around your phone, lifting it for a better look. His jaw clenched so tight you could see the muscle ticking. His eyes darkened, the warmth from moments ago replaced by something possessive, something dangerous.
"This is your fucking wallpaper?"
Before you could respond, Sunghoon scoffed—low, humorless, dripping with jealousy.
"You let him put his hands on you like this?" His voice was deathly quiet, but his grip on your thighs said everything. "You let him claim you like this while you're still dripping with me?"
Your body twitched at his words, still overly sensitive from your last orgasm.
Sunghoon noticed. Oh, he fucking noticed.
And it just made him worse.
"You think he could ever fuck you like I do?"
You barely had time to process before he pulled out of you—only to slam back in, hard enough to knock the breath from your lungs.
A strangled gasp left your lips.
You were still reeling from the first round, and now he was giving you no chance to recover. No time to think. He was fucking into you like he was trying to overwrite every memory you had with that guy.
Like he was trying to remind you exactly who you belonged to.
Your fingers dug into his back as his pace turned brutal, as the sounds of wet skin meeting filled the night air. Your body was already too sensitive, already on the verge of breaking all over again.
His hand grabbed your jaw, forcing you to look at him.
"Say it." His voice was a snarl. "Say he doesn’t matter. Say I’m the only one who gets to have you like this."
Your head was spinning, pleasure coiling tighter with every ruthless thrust.
"You are," you gasped, "Only you—fuck—please—"
That was it. That was all he needed.
He cursed, burying himself deep, his body shuddering as he chased his release. His lips crashed against yours, swallowing your moans, owning every little sound you made.
"Mine," he growled, "Mine. Fucking mine."
When you came, it was with his name on your tongue and his hands gripping your waist so tight it was almost bruising.
And this time—he didn’t pull away.
Your body was still trembling when Sunghoon finally pulled out of you, his hands still gripping your waist like he wasn’t ready to let go. Like he was making sure you knew—there was no escaping him now.
And maybe... you didn’t want to.
You barely had time to recover before he reached for your phone again, swiping it off the hood of the car with two fingers.
Your breath hitched. "Sunghoon—"
The contact name flashed across the screen. ‘Jihyun 💙’
He brought the phone to his ear, eyes locked onto yours as it rang. One ring. Two. Three.
Because Sunghoon was still staring at you—his dark eyes telling you exactly how this was about to go.
"Hello?" Jihyun’s voice was light, confused. Still clueless.
And the next words out of his mouth? Low, dangerous, absolute.
"What?" Jihyun’s voice wavered. "Who the fuck is this?"
Sunghoon tilted his head, still watching you. Still waiting for you to stop him. But you didn’t.
You just sat there, lips parted, body still tingling with the aftershocks of everything he just did to you.
"I’m the reason," Sunghoon continued, voice smooth as silk, "she won’t be coming back to you tonight."
Jihyun cursed. "Who the hell do you think you are? Put her on the phone—"
Not a playful laugh. Not even an amused one. It was cruel. A warning.
"She’s busy," he murmured. "Too busy screaming my name to care about yours."
And that’s when Sunghoon really twisted the knife.
"You should’ve known," he continued, "she was never yours to begin with."
The phone hit the hood of the car with a soft thud, but the tension in the air? Suffocating.
You swallowed hard, heart hammering in your chest. "Sunghoon, I—"
His lips were on you before you could finish.
A deep, bruising kiss, one that left no room for second thoughts.
Because Sunghoon already knew.
You were his. You always had been.
There was no denying it anymore.
