Just sex-part 3 | Jeon Jungkook
After her boyfriend cheats on her, Y/N’s heartbreak leads to one reckless night with her childhood best friend, Jeon Jungkook. What begins as a drunken mistake turns into a secret
arrangement with strict rules—no feelings, no jealousy, and no falling in love. But the closer they get, the harder it becomes to pretend it’s just physical. When emotions begin to blur the lines between friendship and something more, Y/N must decide if risking her heart is worth losing the one person who has always been there for her.
They promised each other it was just sex—no feelings, no love… until breaking the rules became impossible.
𐙚 Paring: JungkookxReader
𐙚 Genre: Friends to Lovers
𐙚 Warning: 18+ explicit content Infidelity (cheating) nasty smut Alcohol use / intoxication Mature themes Emotional distress / heartbreak Strong language Sexual situations domjk! X sub/domreader
𐙚 Wc: 3.9k+
𐙚 Part 1 The Mistake
𐙚 Part 2 When love breaks
𐙚 Part 3 Not your girl anymore
𐙚 a/n: First off, I want to say thank you guys so much for 100 followers 🤭 and for being interested in this series. I also want to apologize for the slow updates and the short chapter —your girl has a lot going on right now lol. But I’m going to start working on part 4 soon, and it will be better and longer. Thank you all for being patient with me!🫶🏽🫶🏽
Masterlist
Previously part 2 when love breaks
y/n Pov
I wiped my tears quickly, hoping Jungkook hadn’t seen them.
My suitcase rolled behind me as I stepped out of the house, the wheels bumping softly against the pavement. Jungkook stood outside the car, leaning against the door with his arms folded across his chest. He looked calm—too calm.
How long had he been standing out there?
The moment his eyes landed on me, he straightened and pushed himself off the car, walking toward me with quiet concern.
“Hey,” he said gently. “You, okay?”
I forced a smile, even though my chest still ached and my eyes burned from crying. I was anything but okay. Everything felt like it was falling apart. Like I was suffocating and couldn't breathe.
But I lied anyway.
“Yeah,” I said softly. “Let’s just go.”
Jungkook studied me for a moment, like he didn’t quite believe me, but he nodded. Without another word, he took the handle of my suitcase and carried it to the back of the car, lifting it easily into the trunk.
I walked to the passenger side, my hand resting on the door handle as I prepared to climb in.
Then a voice cut through the quiet.
“So, you’re the guy that fucked my girlfriend.”
My entire body went still.
I didn’t need to turn around to know who it was.
Jaxon stood outside the house.
Slowly, I turned my head and saw him striding toward us, his expression dark and furious.
On the other side of the car, Jungkook let out a quiet snicker as he shoved my suitcase the rest of the way in and slammed the trunk shut.
__
Jaxon stood there, anger rolling off him in waves.
Jungkook turned slowly, like he wasn’t in any hurry at all. He walked toward Jaxon, pressing his tongue against the inside of his cheek, his movements were sharp with irritation. When he stopped a few feet away, he shoved his hands into his pockets.
“Watch your mouth,” Jungkook said calmly.
Jaxon let out a dry chuckle.
He rubbed his nose with his fingers before flicking them away like the whole situation amused him. Then he stepped forward.
The distance between them disappeared until they were standing face to face.
Neither of them backed down.
Jaxon was glaring now, his jaw tight, his shoulders stiff with barely contained rage. Jungkook, on the other hand, looked almost relaxed—but the hardness in his eyes gave him away.
The air between them felt thick.
“You think you’re tough?” Jaxon muttered.
Jungkook tilted his head slightly, a slow smirk pulling at the corner of his mouth.
“No,” he said quietly. “I just don’t like people running their mouths.”
Jaxon scoffed, his chest bumping lightly against Jungkook’s as he leaned closer.
“You’re standing in front of my house,” he snapped pointing to his chest, “With my girl.”
Jungkook’s smile disappeared.
For a split second, the two of them just stared at each other—neither blinking, neither moving.
Then Jungkook leaned in slightly, his voice dropping low.
his voice dropping to something colder.
"Your girl?"
“You lost the right to call her that, the moment you cheated.”
__
Your breath catches the second Jungkook says that.
Everything freezes.
Jaxon’s face goes completely still, but the look in his eyes changes instantly—like something inside him finally snaps.
His fists tighten at his sides.
The air between them feels heavy, suffocating.
Jaxon’s chest bumps lightly against Jungkook’s as he glares at him, his eyes blazing with anger.
“You better watch what you’re saying,” he warns.
Jungkook’s expression barely changes.
He tilts his head slightly, completely unfazed by the threat.
“Then make me,” he says quietly.
That’s all it takes.
Jaxon lunges forward.
It happens so fast your brain barely has time to process it.
His fist swings straight toward Jungkook’s face.
“JUNGKOOK—!”
But Jungkook is quicker.
His hand shoots up, catching Jaxon’s wrist mid-punch. The impact makes a sharp sound in the quiet street.
For a second, the two of them struggle, locked together.
Then Jungkook shoves him back hard.
Jaxon stumbles a step before regaining his balance, breathing heavily now, anger blazing across his face.
“Touch me again,” Jungkook says quietly, his voice low and dangerous, “and it won’t end well for you.”
Your heart is pounding so hard it feels like it’s shaking your ribs.
“Stop it!” you shout, rushing forward.
You step between them before either of them can move again.
The second you do, both men freeze.
Jungkook’s arm shoots out instinctively, grabbing your wrist and pulling you slightly behind him.
“Move,” he mutters under his breath.
“No!” you snap, yanking your arm back.
Your chest rises and falls quickly as you look between them, frustration and anger bubbling over.
“What is wrong with both of you?!”
Jaxon lets out a harsh, bitter laugh.
“What’s wrong?” he spits. “Ask him. He’s the one sleeping with my girl.”
The audacity of him to think I’m still someone to him.
“I’m not your girl anymore, Jaxon!” you shout.
The words hit him like a slap.
Silence falls over the driveway.
Jaxon stares at you, stunned.
Your hands are shaking, but you force yourself to keep talking.
“You don’t get to stand here and act like you own me after the way you treated me.”
His jaw tightens.
“And sleeping with him is your solution?” he snaps.
Before you can respond, Jungkook steps forward again.
“Watch it,” he says sharply.
You immediately turn, pressing your hand against Jungkook’s chest.
“Jungkook, stop!”
But it’s already too late.
Jaxon laughs again, the sound bitter and angry.
“Yeah?” he says, pointing at Jungkook. “What are you gonna do about it?”
Jungkook’s eyes go cold.
“You really want to find out?”
Your stomach drops.
“Oh my god—stop!”
You step in between them again, pushing Jungkook back with both hands.
He barely moves, but his attention shifts to you instead.
“Get in the car,” I say sternly.
Jungkook looks at me, confused and still tense. “But he—”
“Now!” My voice cracks slightly. “Please.”
My chest is rising and falling fast, my hands trembling at my sides. I’m trying so hard to keep it together, but everything inside me feels like it’s about to break. I look straight at Jungkook, silently begging him to listen.
“Just go,” I say more quietly, my eyes silently begging him to listen to me. My voice is shaky but firm.
For a moment, he doesn’t move.
His jaw tightens as he glances past me at Jaxon, the anger still burning in his eyes.
Jungkook sighs under his breath and looks back at Jaxon one more time, giving him a long, cold stare before turning away.
Then he walks to the other side of the car and gets in, the door slamming shut behind him.
The sound echoes through the quiet street.
I throw my head back, running my fingers through my hair in frustration as I try to steady my breathing.
Then I turn around to face Jaxon.
_
“Are you serious right now?” I ask.
Jaxon stares at me, his chest still rising and falling from the adrenaline of almost fighting Jungkook. His hands run through his hair before dropping back to his sides.
“What?” he says defensively. “You expect me to just stand there and watch you leave with him?”
A bitter laugh escapes me.
“You cheated on me, Jaxon. What don't you understand?”
The words come out sharper than I expect, cutting through the air between us.
“You don’t get to act like the victim here.”
His jaw tightens immediately.
“I said I was sorry.”
“Oh, you said sorry?” I repeat, my voice dripping with disbelief. “That’s supposed to fix everything?” "That supposed to make us okay?"
Jaxon takes a step toward me, his expression softening slightly, like he’s trying to switch tactics.
“It didn’t mean anything,” he says quickly. “You know that. It was a mistake.”
I shake my head, feeling anger bubble up in my chest all over again.
“A mistake is forgetting someone’s birthday,” I say. “A mistake is sending a text to the wrong person.”
My eyes burn as I look at him.
For a moment, he doesn’t respond.
His eyes flick toward the car where Jungkook is sitting.
“You’re really going to run off with him?” he mutters.
“I’m not running off with anyone,” I snap. “I’m leaving you.”
Those words hang heavily in the air.
Jaxon’s expression hardens again.
“You think he actually cares about you?” he says bitterly. “You think you’re special to him?”
My stomach twists, but I force myself to stand my ground.
“At least he didn’t betray me.”
Jaxon lets out a sharp breath, looking away for a moment before his gaze snaps back to mine.
“You’re seriously throwing away three years for this?” he asks. "A mistake"
My heart aches hearing that.
Three years.
Three years of memories, late-night talks, inside jokes, and promises that apparently meant nothing to him.
“You threw it away the moment you cheated,” I say quietly. "The moment you laid in bed and slept with her."
Silence falls between us.
The car behind me is still.
I can feel Jungkook watching, but he doesn’t interrupt.
Jaxon shakes his head slowly, like he can’t believe what he’s hearing.
“So that’s it?” he says. “You’re just done?”
I swallow hard.
“Yes Jaxson,” I say. We're done."
For the first time since he walked outside, Jaxon doesn’t have anything to say.
And somehow, that hurts even more.
“You know what?” he says bitterly. “Maybe I should’ve done it sooner.”
The words hit me like a punch to the chest.
For a second, I can’t breathe.
“What?” I whisper.
Jaxon shrugs, like it doesn’t matter.
“Maybe if I did, you would’ve left earlier instead of wasting my time.”
__
My heart drops into my stomach.
Three years.
Three years together… and that’s what he has to say. I stare at him, trying to figure out if he actually means it. But the look on his face tells me everything. And suddenly, something inside me just… shuts off.
The sadness.
The hope.
All of it.
“Wow,” I say quietly.
Jaxon doesn’t respond.
I nod slowly to myself before turning around.
The walk to the car feels longer than it should. Every step feels heavy, like I’m leaving pieces of my life behind on the pavement.
When I reach the passenger door, I pause for a second.
Behind me, Jaxon’s voice cuts through the silence.
“Yeah, have fun with your new boyfriend”
My heart breaks. I close my eyes briefly letting a tear drop
Then I open the door.
__
I get into the car and shut the door behind me.
The second it closes, the world outside goes quiet.
Jungkook glances at me from the driver’s seat, his brows furrowed with concern.
“Y/n-"
I stare straight ahead, blinking quickly as my eyes start to burn again.
“Just drive,” I whisper.
He hesitates for a second, then nods.
The engine starts.
Through the window, I see Jaxon still standing in the driveway.
Watching.
The man I loved... is now the same man who broke me.
I turn my head away from the window before he can see the tears falling down my face.
“Just drive,” I repeat quietly.
_
Jungkook pulls the car onto the main road, Jaxon’s house slowly disappearing behind us.
For a few minutes, neither of us says anything.
The silence in the car feels heavy.
Jungkook’s hands tighten slightly on the steering wheel before he exhales.
“Hey… listen,” he starts.
I glance over slightly.
His jaw shifts like he’s choosing his words carefully.
“I shouldn’t have done that back there,” he says. “Starting something with him like that.”
He lets out a quiet breath.
“I was just—”
“Jungkook,” I interrupt softly.
He looks over at me.
“Please… not right now.”
My voice sounds fragile, like if we keep talking about it I might completely fall apart.
Jungkook immediately nods.
“Sorry.”
The car goes quiet again.
I turn my head and stare out the window.
Morning sunlight spills across the streets as we drive, cars passing us every few seconds. People are already starting their day, completely unaware that mine just fell apart.
But my mind isn’t on the road.
It’s on Jaxon.
Maybe I should’ve done it sooner instead of wasting my time.
My chest tightens again.
My eyes start to burn.
I blink quickly, hoping it will stop the tears, but it doesn’t.
One slips down my cheek.
Then another.
I turn my face slightly toward the window, so Jungkook won’t notice, wiping my cheek with the back of my hand.
But the silence in the car shifts. Jungkook notices everything.
He always does.
He glances over briefly.
Then again.
His jaw tightens slightly.
He doesn’t mention the tears.
Instead, after a moment, he breaks the silence.
“Where do you want to go?”
I blink, pulling myself out of my thoughts. The truth is… I hadn’t thought that far ahead.
I mean yeah, I could stay with my mom, but I really didn't feel like breaking the news to her right now.
My suitcase is in the trunk. My relationship just ended. And I don’t really have a plan. I let out a slow breath.
“I don’t know,” I admit quietly.
Jungkook is quiet for a moment. Then he nods once.
“You can stay with me tonight. And decide what you want to do tomorrow”
I turn my head quickly.
“Jungkook—”
“It’s just a place to sleep,” he adds calmly. “Nothing else.”
His voice softens a little.
“You shouldn’t be alone right now.”
I stare at him for a second, unsure what to say.
But right now… being alone sounds worse.
So, I nod slowly. He nods once and turns down another street.
A few minutes later, the car pulls into the parking garage of his apartment building.
The engine shuts off.
But neither of us moves.
Morning light filters in through the garage entrance, casting soft shadows across the dashboard.
I stare down at my hands in my lap, twisting my fingers together.
Jungkook leans back slightly in his seat, running a hand through his hair.
For a while, the only sound between us is the faint ticking of the engine cooling down.
__
Jungkook Pov
The parking garage is still, the faint echo of a car passing somewhere in the distance bouncing off the concrete walls.
But all I can focus on is her.
She’s staring down at her hands in her lap, twisting her fingers together like she’s trying to hold herself together.
Then I hear it.
A quiet, shaky breath.
My chest tightens instantly.
Damn it.
I knew this was coming.
The second we left that house, I could see it in her eyes. The way she kept staring out the window, wiping her face when she thought I wasn’t looking.
She tried so hard not to cry.
But hearing it now—
It makes something in my chest ache.
“…I really thought he loved me.”
Her voice is so small it almost doesn’t sound like her.
For a second, I don’t even know what to say.
Because the truth is…I might actually kill Jaxon if I see him again.
My jaw tightens as his face flashes through my mind. The way he stood there acting like he had any right to be angry.
Like she was the one who did something wrong.
My hands tighten slightly on the steering wheel just thinking about it.
If she hadn’t stepped between us earlier, that punch he threw wouldn’t have ended with me just grabbing his wrist.
I would’ve finished it.
Easily.
But that’s not what matters right now. Slowly, I turn my head toward her.
She’s crying now.
Not loud.
Not dramatic.
Just quiet tears slipping down her face while she tries to keep it together.
And somehow… that hurts worse. I’ve seen her laugh until she couldn’t breathe. I’ve seen her argue, tease, roll her eyes at me.
But this?
This broken version of her?
I hate it.
I hate that he’s the reason for it.
My chest feels tight as I lean back slightly in the seat, running a hand through my hair.
“Hey,” I say quietly.
She doesn’t look at me.
I hesitate for a second before speaking again.
“Look at me.”
It comes out softer than I expect.
Slowly, she lifts her head. Her eyes are red; cheeks damp with tears. And something in my chest twists painfully.
“He doesn’t get to decide your worth,” I say.
My voice is calm, but there’s a sharp edge under it.
“Not after what he did.”
She looks down again, wiping at her face.
“It still hurts,” she whispers.
Of course it does.
Three years doesn’t just disappear overnight.
I stare at the dashboard for a moment, clenching my jaw before exhaling slowly. Then I reach over without really thinking about it.
My hand gently covers hers. She freezes for a second. I don’t pull away.
“I know,” I say quietly.
For a moment, neither of us speaks. The parking garage stays silent around us. Then I glance toward the elevator doors across the garage before looking back at her.
“Come on,” I say softly. “Let’s get you inside.”
Because the last thing she needs right now…Is sitting in a car replaying every word that asshole said to her.
And if Jaxon thinks this is the end of it—He’s wrong.
Because the next time I see him
He won’t be throwing the first punch.
_
We both get out of the car.
She just stands there for a moment, staring at nothing in particular, like her mind is somewhere else entirely.
I walk around to the back and pop open the trunk, pulling out her suitcase and the other bag she brought with her. After closing the trunk, I drag the suitcase behind me and glance back at her.
“Let’s go,” I whisper.
She nods quietly and starts following behind me.
Neither of us says anything as we walk toward the elevators.
I press the button, calling one down. Silence fills the space around us.
Not the comfortable kind either.
The kind that sits heavy in your chest.
When the elevator arrives, the doors slide open with a soft ding. I step aside, letting her go in first. She walks in slowly, and I follow right after, pressing the button for our floor.
The doors close.
The tension in the air feels… strange.
I know she’s heartbroken.
But I plan on fixing that.
When the elevator doors open again, she steps out first. I follow her down the quiet hallway until we reach the door. Pulling out the passkey, I slide the card in and push the door open.
I drag her suitcase across the floor, dropping it beside the door before placing her other bag on the table.
She walks past me without a word and sinks down onto the couch, staring out the window.
Still silent.
Still lost in her thoughts.
And for the first time tonight…
I don’t know what to say.
__
All I know is that I have to be there for her.
No matter what.
No matter what it may be, I’ll always have her back.
I walk closer to her, stopping for a second just to look at her before finally sitting down beside her on the couch.
Her feet are propped up on the cushion, and she’s quietly playing with the hem of the shirt she’s wearing.
My shirt.
My hands rest on my lap as I watch her. Even when she cries… she’s still pretty.
No—she’s beautiful.
She always has been.
But seeing her like this right now? It makes something inside me burn with anger.
Not at her.
Never at her.
But at the person who made her feel like this.
“You can sleep in my bed tonight,” I say quietly. “I’ll take the couch.”
For a moment she doesn’t say anything.
She just looks at me.
Those soft eyes meet mine, still a little red from crying, but gentle in the way they always are.
Like she’s trying to understand why I’m being so careful with her.
After a second, she slowly nods.
Still silent.
But that small nod tells me everything I need to know. She stays quiet for a moment after that. Her fingers are still playing with the hem of my shirt, twisting the fabric between them like it’s the only thing keeping her grounded.
I keep watching her, not saying anything. After a while, she takes a slow breath and finally speaks.
“I think… I’m gonna go lay down.”
Her voice is soft, almost barely there.
I nod. “Okay.”
She slowly lowers her feet from the couch and stands up. For a second it looks like she might lose her balance, so I stand up too, ready just in case she needs me.
But she steadies herself.
She walks past me toward the bedroom, her steps slow and tired.
When she reaches the door, she opens it and disappears inside, quietly closing it behind her.
The soft click of the door echoes through the apartment.
And just like that… she’s gone.
I stand there for a moment, staring at the closed bedroom door like it might open again.
Like she might come back out.
But she doesn’t.
A heavy sigh leaves my chest as I run a hand through my hair, pacing the living room for a second before finally dropping down onto the couch she was just sitting on.
The cushion is still warm.
My eyes fall on the spot where her feet were resting earlier, and my jaw tightens.
She looked so small sitting there.
So broken.
I lean forward, resting my elbows on my knees as I stare at the floor.
Jaxson.
Just the thought of his name makes my blood boil.
How someone could have someone like her… and still throw it away like it meant nothing is something I’ll never understand.
My hands clench together.
She didn’t deserve that.
She didn’t deserve to find out the way she did either.
The image of her face earlier flashes through my mind — the shock, the pain, the way her whole world seemed to collapse in seconds.
A strange feeling twists in my chest.
Guilt.
Regret.
Maybe things could’ve been handled differently.
Maybe…
I exhale slowly, leaning back against the couch and staring at the ceiling.
But what’s done is done.
Now all that matters is her.
And making sure no one ever hurts her like that again.
Especially him.
__
Moments had passed and
She had been in the room all day.
Earlier, I knocked on the door and told her I was going out to buy a few things.
All I got back in return was a quiet “mm.”
That was it.
Now it’s late, and she still hasn’t come out.
Not even once.
I tried bringing her food a few times earlier, knocking gently on the door and telling her she should eat something. But every time, she said the same thing.
“I’m not hungry.”
The first few times, I let it slide.
But now?
Now I know this is starting to become unhealthy.
If I really want to help her… I need to try a little harder.
I push myself off the couch and walk into the kitchen, opening the fridge. The light spills across the counter as I stare inside, grabbing a few things.
If she won’t eat for herself…
Maybe she’ll eat if I make something.
The quiet sounds of cooking fill the apartment—pans clinking softly, the low hum of the stove.
For a while, it’s just me and the silence.
Until I hear something behind me.
Soft footsteps.
I glance over my shoulder.
And there she is.
Standing in the hallway, her hair slightly messy, my shirt still hanging loosely off her frame.
She looks tired.
Like she hasn’t slept at all.
For a moment, neither of us says anything.
Then her quiet voice breaks the silence.
“I couldn’t sleep.”
