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© 2026 Fanprose

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    Cover image
    PublishedApr 27, 2026
    UpdatedJun 11, 2026
    LengthOne Shot
    Wordcount2,366
    Views278
    Rating
    Mature
    Genres
    SmutFluffy Smut
    Group
    LE SSERAFIM
    Pairings
    Female Idol(s) x Male Reader
    Idols
    Chaewon (LE SSERAFIM)
    One Shot

    [We'll Keep This] Our Dirty Little Secret

    Complete
    SinsWithPleasure◈Apr 27, 2026

    You and Chaewon have a little tryst in school.

    11

    And… now.

    “Eeek!”

    Kim Chaewon, otherwise known as your beloved girlfriend, yelps in surprise when you bust out of a door and pull her into an unused classroom. Not the most romantic, admittedly—this was more “kidnapper” than “boyfriend"—but no one should know what would be going on in this room. Skipping classes to have one hour of time with the significant other? Horrible behavior.

    "Hi, baby.”

    “Jagiya! What are you doing?!”

    You pull Chaewon into a big hug, and she returns it, her body relaxing into the embrace. She’s been busy as Head Prefect, and you’re more than happy to provide her with pockets of time where you can give her a little boost of love and encouragement.

    “Making time to be with you, of course!”

    “I can’t, jagi, there’s that talk… I have to be there because… y'know…” Chaewon pouts as she raises the red and black tie that denotes her prefect appointment, and you pull your cutie into another hug.

    “Aiish, didn’t you say attendance wasn’t taken? And in your words, it was ‘stupid and wasting time’?”

    “Yeah.” Chaewon’s muffled reply comes from your shoulder. “But—”

    “No buts, jagi. You’re spending time with me, just for this hour, okay?

    "Okay, fine.” Chaewon can’t resist the break time. You know she’s desperately in need of one—this is the busiest period of time in the school year for the prefects, and she’s been complaining a lot about it. You’re more than happy to be able to provide a bubble for her to relax.

    “Anything you wanna do?”

    “I’d like to have teddy bear time, jagi.”

    Chaewon blushes. It’s your name for a seated cuddle, where Chaewon sits on your lap facing you, and you cuddle up. It’s one of your favorite pastimes with her, and you’re not going to say no to her call for physical affection ever.

    You lead Chaewon to a desk and sit down on the chair as she straddles your lap. You stare at her lovingly as she gets comfortable, and when she leans in for the cuddle, you melt into her as she melts into you too—you’ve both missed each other so much.

    “I’ve missed you, baby.”

    “I’ve missed you too.”

    Both you and Chaewon enjoy the cuddle for a while before Chaewon pushes herself up from you.

    “Eh?”

    “Reseating.”

    Chaewon reseats herself for more comfort, and she grabs your cheeks, her thumbs gently going over your skin. You smile fondly at her as she returns the same fond smile.

    “I love you.”

    “I love you too.”

    Chaewon leans in to connect your lips to hers. She kisses you gently, and you pull her closer as you enjoy the intimacy with her. Now that you had some time to slow down and relax with her, you were going to make the best of it. Chaewon definitely needed it, and you can’t resist touching your girlfriend.

    During the kiss, you let your hands run across her back. You move slowly, savoring the feel of the smooth cloth of her uniform across your hands, her warmth underneath it. One hand raises up to cradle her head as you deepen the kiss a little before breaking for air.

    Chaewon pants for air, her skin flushed. She chases after your lips again, her kiss still gentle but with a little more urgency. She hugs you closer, and you wrap your arms around her, both hands on her back this time, and you begin to explore her body. You run your hands over her back again, Chaewon kissing you harder as your hands run over the straps and clasp of her bra. She almost pins you to the chair with how hard she kisses you, but not that you mind—getting pinned under Chaewon during physical intimacy is exactly where you want to be.

    You’re tempted to unclasp Chaewon’s bra. Chaewon only gets this forward when you’ve turned her on, and she probably wouldn't—

    “Mmf~!”

    Two things happen during your train of thought: first, Chaewon releases a sultry moan during your kiss, one that goes straight to your hardening cock, and secondly, you feel Chaewon start to grind down on you. The delicious friction of Chaewon’s body against your crotch gets you to moan too, and you’re starting to get warmer, your thoughts dirtier.

    Chaewon breaks the kiss for air. Both of you try to catch your breath, and you can’t keep your eyes off Chaewon’s lips, just as she can’t keep her eyes off yours. You groan as Chaewon shifts herself, and she cuts off a moan when she grinds right over your bulge—

    You thought she would stop. She doesn’t.

    Chaewon keeps grinding down on you as she pulls you into a hug. You can hear every whimper, every moan, every gasp next to your ear as your girlfriend decides to give in to her desires. This isn’t the first time you’ve been intimate with Chaewon, and you know she has a bad track record with resisting the temptations of sexual pleasure, especially when alone with you.

    “Fuck, Chaewon…”

    You lower your hands to try to grab Chaewon and stop her. You’re not sure whether it’d be good to carry on—Chaewon’s a prefect, and even though you’d love to have sex with her, you’re still in school.

    “Chaewon, no, we ca—”

    “Please, I’ve been so busy…”

    Chaewon’s shaky voice displays the pure neediness she exudes.

    “I haven’t even had the time to masturbate at all, jagi.

    "Please, I need you.”

    When her sentence ends, your lips are on Chaewon’s, tongue already attempting to gain access for a deeper kiss. Chaewon deepens the kiss with you in response, and she pulls herself even closer to you, her clothed pussy grinding down hard on your bulge. Your hands, formerly on her waist to stop her, have now instead moved down under her skirt to her ass, kneading on the soft bountiful flesh. The pleasured moans your girlfriend releases only gets you hornier.

    “Jagi~!”

    You break the kiss with Chaewon for air, and the lewd display of her on your lap, in her uniform, sultrily grinding her wet pussy against down on your cock has you cursing up a storm. You rip the Velcro that Chaewon’s tie together at the back of her collar, the tie thrown aside in favour of undressing your girlfriend. When the first two buttons of her blouse fall open, your lips glue themselves to her neck as you nibble on her sensitive spots. Chaewon is putty in your lap—her nails dig into your back as she gasps and whines at the little nips of your teeth on her skin, but she doesn’t stop ruining her panties by grinding down on you. You can’t wait to fuck your girlfriend.

    Bit by bit, the buttons pop open, and you get to see Chaewon’s breasts clad in a white bra. One hand of yours is already working to unclip the pesky undergarment, the other helps to pull the blouse off her body. With a 'click’, Chaewon’s bra falls loose, and she pulls it off herself to reveal her cute little breasts to your eyes.

    “Jagi, take off your clothes too.”

    You’re already halfway to pulling your own shirt off at Chaewon’s words. You join her in being topless, and you dive in to taste her breasts, your lips capturing one nipple and a hand capturing her other breast. With the combined assault you mount on her body, Chaewon’s moans echo around the empty room as the pleasure washes over her, each gentle suck on her nipple prompting her to push your head harder against her as she seeks more of it.

    “You sound so naughty, Chaewonie~.” You chuckle, the puff of air you exhale blowing over Chaewon’s nipple, the coolness of it drawing a gasp out of your girlfriend.

    “S-Shut up, jagi! It’s your fault!” Chaewon’s red flush across her soft cheeks is equal parts cute and equal parts arousing, considering how hot she looks topless on your lap right now.

    “Mine? I’m not the one who decided to use her boyfriend to masturbate while kissing.”

    “But it's… it’s your cock that I want fucking my pussy right now, jagi. It’s your fault!”

    You swear you’re about to tear a hole through your pants with how fucking hard her words make you. You can’t even keep yourself calm anymore.

    “Do you have any idea how hard that makes me, Chaewonie?"

    A lustful glint shines across your girlfriend’s eyes.

    "Show me?”

    You push Chaewon off your lap and rise to your feet. Both of you reach for your remaining clothes, and the sound of cloth ruffling is all that is heard for a moment as the both of you undress fully. You stare in unbridled lust as Chaewon’s skirt falls to the ground with her panties, her naked body on display for your very eyes. Your pants fall a second later, your hard shaft springing out of the prison of your uniform. Chaewon hops atop the desk behind her, and as you kick both of your uniforms aside, she spreads her legs wide open to show you her pussy drenched in her arousal. You begin to jerk yourself in anticipation, and Chaewon executes her killing blow.

    “Look at how wet you made me, jagi.”

    Your girlfriend splays her labia open with two fingers, and you feast on the sight of Chaewon literally dripping onto the desk as she shows you all of her wet pussy. Your cock twitches as more precum drips out of your tip. You’d already been so wet enjoying the foreplay, but the sight of Chaewon spreading her cunt wide open for you…

    “Come fuck my pussy.”

    “Fuck!”

    Your expletive rings around the empty room, and you crash your lips against Chaewon’s in a torrid kiss. You grab your girl by the hips and readjust her on the desk, your length resting along the wet slit of her pussy, and you grind your shaft against her clit as she moans. You can feel how hard her clit is as it rubs against the underside of your shaft, her juices lubricating your entire length the more you grind down.

    “Put it in, jagi, please!”

    You can’t deny Chaewon anymore, and neither can you deny your primal desires. You line your shaft up with Chaewon’s pussy, and with a shift of your hips, you finally penetrate your girlfriend. Inch by inch, you fill your girlfriend’s tight cunt with your shaft, and when you hilt, you move to pull out halfway before thrusting back in. Rinse and repeat over and over, and Chaewon’s loud moans join yours as you finally enjoy the pleasures of sex with her.

    “Fuck, Chaewon, fuck, fuck, fuck!”

    “Jagi, jagi, kiss me, kiss me!”

    You oblige immediately, and you join lips with Chaewon again as your tongues swirl around the other’s. Chaewon’s hand grips you under your ear as you make out with her, and her other hand snakes between your bodies to rub her clit in time with your thrusts. You have an arm wrapped around her body, the other holding you up for support against the surface of the neighboring desk. Chaewon’s pussy is so warm, so wet, so tight—the pleasure of fucking her cunt is all that you can process.

    When you break the kiss for air, you press your forehead against Chaewon’s as you keep on thrusting into her tight sex. You stare deep into Chaewon’s eyes, the dark brown pools glossed over in lust and pleasure. However, underneath it, you can sense how happy she is to be making love with you, and how much she loves you. You can’t help but pull her in for another kiss, one that she hungrily reciprocates. Both of you moan into the kiss, Chaewon getting louder when you move your free hand from the table to her right breast, kneading the soft sensitive flesh and gently rubbing her taut nipple. Chaewon breaks the kiss, and you dive for her neck again to nibble on her skin.

    “Jagi, jagi, keep fucking me like that, fuck, right there, fuck!”

    You begin to focus your thrusts exactly the way she demands you to, your cock hitting her G-spot on every thrust in. Chaewon’s pussy gets wetter and tighter with the increased stimulation, and with her fingers on her clit rubbing herself hard, you know she’s so damned close—

    “Jagi, fuck, I’m gonna cum, I’m gonna cum! Cum with me, cum inside me, cum inside me!”

    With a loud grunt, you level three more thrusts into Chaewon’s tight pussy before she cries out in pleasure, her body shuddering as her orgasm hits her. Her legs wrap tightly around your waist and lock around you as she bucks her hips repeatedly, her body writhing atop the desk as her walls quiver around your cock, her juices gushing along your length. With Chaewon in the throes of her orgasm, you’re brought to your own as your hips stutter, your thrusts losing their rhythm as you empty your balls deep into your girlfriend’s still orgasming cunt, burst after burst of semen painting her walls white deep within her. You pull Chaewon into a tight hug against your chest as you fill her up with your cum, one that she reciprocates almost instantly as you ride the waves of pleasure together until they subside to nothing.

    When you soften, you pull out from Chaewon’s freshly fucked hole, a trail of white leaking from her pussy almost immediately. You grin at the satisfied, exhausted smile Chaewon shoots at you, her carnal desires finally sated with your help. You’re quick to grab tissues from the little pack in your pockets to clean up, and both of you attempt to clean up as much of the mess as you can, as quickly as possible. Right as you throw the final piece of tissue away, the school bell rings, signifying the next period beginning.

    When you hand Chaewon her uniform and undergarments, she pulls you in for a soft kiss.

    “Thank you, jagi. I love you so much.”

    “I love you too.”

    Chaewon giggles when she gazes down at your naked bodies.

    “I guess we’ll keep this as our dirty little secret~.”

    11

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