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jupiterpilgrim · 12 days

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The Pleasure Equation: When the Nerd Solves Everything, Including You

Nayeon x Male Reader

word count: 8.2k

a/n: Yo, my first published smut. I hope you like it. Feel free to tell me what you think.

—

You're lying on the couch, staring at the ceiling and wondering why, in the 21st century, universities still think pairing people for projects is a good idea. Plus, you're terrible at this subject. Advanced Calculus? They might as well call it "How to Ruin My Weekend." The only saving grace is that your partner, Nayeon, the biggest nerd in class, will handle most of it. For you, it seems like a golden ticket: she does the work, and you pretend you helped. It was the perfect plan. What could go wrong?

The doorbell rings. Of course, it’s her. You were expecting it—you could almost time Nayeon's nerdy punctuality. And, as always, she looks like the picture-perfect good girl—cardigan, glasses, skirt, that innocent, serious air of someone more interested in spreadsheets than in people. The kind of girl most guys wouldn't look at twice. But you, well, you had to look. It was obligatory since she was going to carry your weight in this project.

You open the door, and there she is, laptop under her arm, shy smile and everything you imagined. The nerd who's here to save your semester.

What you didn’t know—and God knew you were about to find out—is that Nayeon had planned a different type of study for this project.

She walks in with that confident stride that only people who are either extremely smart or who know the subject is your lifeline have. And honestly, you’re not ready for the energy she brings.

“Hi,” she says, glancing around your house, skipping any small talk.

“Hey, Nayeon. Nice to have you here.” You try to sound more enthusiastic than you really are. “Want anything? Water, juice, tea?” you offer, hoping to buy yourself a few more minutes of procrastination before facing the project.

“No, thanks.” She looks at you over her glasses, almost as if she’s analyzing your soul. “I think we should just get started. The sooner we finish, the better.”

“Yeah, better,” you think. And with that, off you go to your bedroom. Yes, the bedroom, because it’s the only place in the house that seems even remotely presentable. There are piles of books (that you haven’t read, just skimmed for the basics), notebooks with ridiculously short notes you took, some clothes scattered here and there... oh, and your unmade but perfectly comfortable bed, where you sit on the edge. It was a clinically tidy room compared to the living room or the kitchen.

Nayeon doesn't seem to care about anything. She sits at the desk chair and opens her laptop.

The project, of course, is about "Modeling Algebraic Functions for the Optimization of Industrial Processes." Or something equally mind-numbing that only Nayeon seems to understand. You’re more lost than someone trying to solve a Rubik's cube in the dark. And it’s all because of your dad, who, in his non-threatening way, persuaded you to follow the family career path. Damn Engineering (and tradition).

Nayeon, as always, is already deep into the work, fingers flying over the keyboard while her glasses slip to the tip of her nose, balancing dangerously between focused nerd and, well... ¿sexy? nerd?

Not that you’d admit that.

She glances at you, and for a second, you almost feel like she expects you to say something useful. Which, of course, would be a grave miscalculation. Literally.

“So, I thought you could start with the part about differential equations,” she says, making the suggestion with the ease of someone asking you to hold a cup, when what she’s really offering is a grand piano. “And then the graphs…”

You pretend to be genuinely interested. Which means nodding in a way that could be mistaken for understanding if someone looked quickly, but in reality, you're utterly lost.

“Oh, sure, differential equations…” you repeat, as if the words held any special meaning. They don’t.

Nayeon sighs and goes back to typing, clearly aware of the level of uselessness you're operating at. She’s probably already mentally dividing the entire project, calculating how many extra hours she'll need to cover for the fact that you're, essentially, dead weight.

“Maybe you could review the introduction,” she suggests, polite but with the patience of someone talking to a child who still doesn’t know the difference between shapes.

You scratch your head, pretending to read the introduction she’s already written. One, two lines. Everything looks very... professional. You attempt to seem helpful:

“You know, I think you’re... um... doing great with this. Maybe... maybe I should focus more on the creative part of the project, like... the presentation design?” you suggest, smiling, as if making a PowerPoint full of silly animations was an undervalued talent in academia.

She raises an eyebrow.

“Design?” Nayeon asks, sarcasm dripping from her tone. “In an Advanced Calculus project? You want to fill the presentation with glitter and stars, is that it?”

“Hey, glitter makes everything better,” you reply, defensive, but unable to suppress a smile. “Maybe throw in some memes to lighten the mood… People love memes... I guess.”

“I’m not sure if you're joking or if you've completely given up on life,” Nayeon mutters, with a short, dry laugh, returning to the keyboard.

You shift on the bed, trying to find a position that seems less like a desperate student and more like someone slightly focused on the project. The silence is broken only by the sound of her typing and your occasional murmur of fake approval: “Hmm, sure, that makes sense…”

It doesn’t.

Then, out of nowhere, Nayeon looks at you again, but this time with a different kind of curiosity. There’s something in her eyes, something that goes beyond pure calculation—and we’re not talking about the equations.

“You live alone, right?” The question comes casually, almost innocently. Almost.

“Uh, yeah, I do,” you answer, a bit confused by the sudden shift. “Why?”

“Just... curious,” she replies, but the smile she gives is far from innocent. “It must be nice living alone. I bet you can do whatever you want, right? No one around to hear...”

“Yeah, kind of,” you say, scratching the back of your neck. “Like... I can have pizza for breakfast without being judged. And play video games late. It’s not as glamorous as it sounds.”

Nayeon laughs, but in a way that makes you feel a bit uncomfortable, like she knows something you don’t.

“And... what do you mean by ‘do whatever you want’?” you ask, hesitant but unable to resist the curiosity.

“Oh, nothing,” she says, looking away for a second. “Just thinking... it must be interesting. Having that kind of freedom.”

She pauses and looks directly at you again, her fingers sliding slowly across the keyboard, as if the project was now the last thing on her mind.

“Tell me something... what’s your type?” The question lands like a stone thrown into a calm lake, sending ripples of confusion through you.

You almost choke.

“My... type?” you repeat, as if it’s a math problem with too many variables.

“Yeah, like... what do you find attractive in someone?” Nayeon continues, her voice far too casual for the situation. She leans forward slightly, her eyes locked on yours.

“Well, I dunno.” You shift uncomfortably. “I guess... someone fun, you know? Someone who can make me laugh.”

“Hmm. And me?” Nayeon tilts her head, her glasses now low enough to reveal her sharp eyes behind them. “Do I make you laugh?”

You freeze, because the right answer to this feels like a trap.

Sure, Nayeon’s made you laugh plenty of times, especially when she freaks out over losing half a point on a test. But that doesn’t seem like the kind of "laugh" she’s asking about.

“Uh, yeah, of course!” you respond, quickly. “I mean, in a good way. Not that I’m laughing *at* you, but... you know what I mean, right?”

She smiles, and you’re not sure if she’s satisfied with your answer or just amused by your nervousness.

“You know,” Nayeon continues, “I think I prefer guys who... know what they want. Guys with attitude.”

You nod, trying to process what’s happening.

“Oh, sure. Attitude is always good, right?” you reply, having no idea where this conversation is heading.

She looks at you in a way that feels almost predatory, and you realize that, somehow, whatever control you thought you had over this situation (even a little) now belongs entirely to her.

“Do you have it?” she asks. “Attitude?”

At that moment, you realize two things: first, Nayeon isn’t interested in solving differential equations today. And second, you probably should’ve agreed to do the graphs.

You feel the pressure of the question like a multiple-choice exam where all the answers seem wrong.

"Now?" you stammer, as if time itself is about to collapse. "Uh… I don’t know, I think we’re in the middle of a project, right? I wouldn’t want to interrupt…"

"Interrupt?" She lets out a short laugh. "I think work went out the window a long time ago, don’t you?"

With that, she stands up, closing the laptop, and starts walking slowly around the room, as if inspecting the space, or maybe just teasing you on purpose. Every step she takes seems more choreographed than anything you’ve ever seen on stage.

Suddenly, she stops, untying her hair and shaking it loose.

"You know," she continues, turning her gaze back to you, "I thought of a way to make things more interesting."

Your brain, of course, is already in full panic mode, but your mouth, as always, insists on trying to sound casual.

"Really? Interesting how?" you ask, hoping the answer isn’t something like "Russian roulette."

She crosses her arms. You realize that, at some point, you completely lost any chance of controlling your own fate.

"A game," Nayeon says, with a sly smile. "Let’s play a game. What do you say?"

"What kind of game?" you ask, already regretting letting curiosity win over survival instinct.

"Oh, don’t worry, nothing too crazy," she replies, shrugging as if the suggestion were perfectly innocent. "Something fun, to relax, since the project clearly isn’t going anywhere today."

She steps closer to you, with that conspiratorial air of someone about to suggest something really dangerous.

"What do you think?" she whispers, lowering her voice. "You up for playing with me?"

"Err... depends on the game, right?" you reply, trying to sound laid-back.

Her eyes gleam behind her glasses, and the smile on her lips is pure provocation.

"Let’s see… How about something simple?" she suggests, her eyes never leaving yours. "Questions and answers. To test what you've been learning in the course."

"Just that?" you ask, half skeptical, half curious.

She speaks with a lightness that contrasts the intensity of her proposal:

"Of course not. For every question you get right, I’ll take off a piece of clothing."

You blink. Blink again. And then a third time, just to make sure you heard correctly.

"What?" you blurt out, a laugh escaping before you can control it. "You’re kidding, right?"

Nayeon crosses her arms, that crafty smile still on her face. Apparently, she’s not kidding.

"I’m dead serious. And if you manage to make me take off everything, I’ll give you a prize."

"A prize?" You try to keep your composure, but all you can think about is that maybe studying Calculus isn’t so bad after all. "What kind of prize?"

Nayeon doesn’t respond with words. Instead, she lifts her skirt just enough to reveal a glimpse of her panties — white, of course, because even in this, she has to be precise and teasing.

You swallow hard, your eyes nearly popping out of their sockets. Suddenly, the temperature in the room rises by five degrees, and it has nothing to do with global warming.

"Hm... okay, let’s go," you respond, trying to sound casual, but in reality, your mind is a complete mess. Who knew the class nerd had this side to her?

"Great." Nayeon giggles before adjusting her glasses and kicking off her shoes to, let’s say, get more comfortable. "First question: What’s the basic principle of algebraic function modeling applied to industrial process optimization?"

You stare at her. Of course, it wasn’t going to be an easy game. Your brain tries, with herculean effort, to remember what the hell that means.

"Hm… I think… it’s using equations to simplify a complex process?" you guess.

She smiles.

"Well, close enough. You got the general concept," she says.

She starts with the most innocent pieces, of course. The cardigan that you barely noticed she was wearing, because let’s be honest, your focus was more on the project — or on how not to do it... Well, at least that’s what you thought. Now, the focus has definitely changed. Every button that opens feels like a small personal victory. And before you know it, the cardigan is on the floor. She looks at you with a sly smile.

"Shall we continue?"

"Damn right, I’m enjoying this!"

"How do you define an improper integral?"

You blink. Of course, she’d come up with one of those questions you never knew the answer to.

"An… improbable integral?"

She laughs, a clear, almost musical sound that fills the room. If Nayeon were the type of person who enjoyed academically torturing others, she was definitely on the right track.

"I’ll give you a hint," she leans forward, just enough for you to see part of the top underneath her perfectly white blouse. "It has something to do with limits."

Limits. Of course. Yours are being tested in a different way. You vaguely remember the professor mentioning something about this, between naps.

"Oh, right! It’s when the interval goes to infinity, right?" you venture, your heart already beating faster.

"Correct!" She claps her hands, feigning innocent excitement that definitely doesn’t match the way her hands move toward the buttons of her blouse. One button, two, three... and soon, Nayeon’s blouse is off, revealing a black camisole, tight enough to show that she had planned all of this meticulously.

You exhale a breath you didn’t even know you were holding. Now, you’re invested in the game.

"Next question: What are the three most common methods to solve a system of linear equations?"

Linear equations? Of course, you slept through that class. But then… things start to click.

"Elimination, substitution, and… matrices."

"You’re getting the hang of it, huh?" she says, her voice almost a purr.

Without hesitation, she leans back a little and, with a slow, sensual gesture, removes the black camisole, now revealing a delicate white bra, almost the same shade as her skin.

Your heart is pounding in your chest, but somehow, you’re starting to enjoy the game, and oddly enough, math too. Well, this is definitely a more rewarding way to learn something you don’t like.

"Now an easier one," she teases, as if giving you a break. "How do you calculate the area under a curve?"

You swallow hard, not because of the question, but because Nayeon is crossing her arms in a way that’s far from casual, emphasizing even more what’s... well, on display.

"Definite integrals," you answer quickly, perhaps with more enthusiasm than necessary.

She gives a small round of applause, but this time doesn’t make any immediate move to take off anything else.

"Very good! But... are you sure you want to continue?" she asks, tilting her head, as her fingers rest on the zipper of her skirt.

You’re not sure if you want to continue the game or skip straight to the “prize,” but whatever it is, you need this girl naked. But for that you need to concentrate, but how would you do it? It's certainly not easy. Not when she runs her fingers, provocatively slow, to the zipper of her skirt.

“Alright, just one more, then,” she says, with a false lightness that only adds to the tension in the air, “a simpler one, I promise. If you get it right, I’ll take off one more piece. If you get it wrong… the game’s over.”

Your mind is racing, a mix of nerves and pure curiosity. After all, how did you end up here, being quizzed by Nayeon, The Nerd™? And now, The Nerd™ was about to strip.

Weird world.

“Okay… ask the question,” you say, trying to seem calm. Just trying.

Nayeon raises an eyebrow, still toying with the zipper of her skirt, but not pulling it down at all, just… waiting. “What’s Stokes' theorem?” she asks.

You almost laugh. Not really, more like a nervous chuckle that escapes before you realize… crap, you actually don’t remember.

“Erm…” you begin, desperately searching for some vague memory of a class you definitely slept through.

Nayeon doesn’t miss the look of panic on your face.

“Ah, struggling?” she asks, her voice sweetly sadistic. “How about a hint?” She leans in, the skirt still untouched, but in a deliberate move, she adjusts her bra, already more revealing than it should be, giving you a clear view of her generous cleavage.

You clear your throat, dying a little inside but trying to maintain your composure.

“Uh, it has to do with surface integrals, right? Something about flows… and vectors…”

“Exactly! Flows and vectors,” she repeats, satisfied. And then, in an almost innocent gesture, as if she were merely taking off an uncomfortable shoe after a long day, she pulls the zipper of the skirt, which slides down her legs, hitting the floor like it didn’t even matter, revealing her bare legs and white panties. Her thighs are even more perfect than you imagined—toned, lightly defined. Your throat dries up as if you’ve just run a marathon, but the only thing racing is your heart.

Honestly, you’re never really prepared for every time she gets more and more exposed. She places a hand on her hip, looking at you with that expression that makes you wonder how you never realized this before—that yes, Nayeon, the “nerd” of the class, was a girl far more complex than any Stokes theorem.

“So, what now? Want to continue or… are you satisfied?” She pouts adorably, challenging you, and you know, at that moment, that she wants you to keep going. After all, she’s having way too much fun.

You take a deep breath, determined, even though your mind is light-years away from any coherent thought.

“Sure. Next question. I’m going to win my prize.”

“What a determined guy,” Nayeon chuckles softly, with that teasing air, as if you were on a quiz show and not in some sort of erotically torturous strip game for the brave. “Alright then… explain the principle of superposition.”

She knew you had no idea. You knew that she knew. But what did it matter? What mattered was that your eyes were glued to every movement she made. She tilted her head, playing with the strap of her bra.

You think for a moment. Superposition… electric fields… sure, you got this.

“It’s when, hmm…” your voice cracks, but you force yourself to sound confident. “It’s when the sum of the effects of multiple causes is equal to the sum of the individual causes. Each field acts like the others aren’t even there.”

She leans in, subtly, fiddling with the strap of her bra, her eyes never leaving yours.

“Exactly,” she says, letting the strap fall with a slow motion from one shoulder. And then, from the other. “Congratulations.”

The bra falls to the floor.

You try, honestly try, to keep your focus on what’s happening, but there’s a problem. Actually, two, and both of them are right in front of you, fully exposed. No matter how much your mind insists that you need to concentrate on the game… you simply can’t.

“J-just one more question, right?” You stammer, desperately trying to focus on your shoes, the wall, anything but… well, Nayeon, and the fact that she was now practically naked.

She leans forward slightly, arms “casually” crossed, and you’re convinced she did this just to make sure your brain imploded. One of her breasts lightly brushes against her arm, and your mind screams something between HELP and THANK YOU.

"Exactly,” she says, and there’s a hint of malice in her voice, that tone that indicates she knows by now you’re one step away from a complete meltdown. “One last question. If you get it right… you win your prize. If you get it wrong… you’ll do the entire project alone.”

Your head throbs, struggling to focus on anything besides her smooth skin and the hair falling loosely over her shoulders.

“Alone?” you repeat, dumbfounded. A simple word, but you can barely get it out.

She bites her lip, enjoying herself. And then, in the most seductive voice possible, she drops the bomb:

“Of course… if you mess up now in the final minutes, you’ll have to do it all on your own. But if you get it right, you’ll see what’s under this,” she pulls at the side of her white panties slightly, just enough to let your imagination spin. “And who knows what else…” Her voice is a caress wrapped in pure temptation.

Yeah, it’s worth the risk.

Focus, you tell yourself, as if that’s remotely possible. Here you are, in a state of complete mental confusion, and Nayeon is there, almost naked, suggesting there’s just one question left before… well, paradise. And hell, too, because clearly, you wouldn’t survive doing this fucked-up project alone.

“Alright, let’s go,” you force the words out. “What’s the last question?”

Nayeon smiles in a way that says, I got you. And of course, she did. She leans in again, this time closer, her panties still firmly in place, but for how long?

“Ready for this?” she murmurs, with the tone of a final temptation. “What law of electromagnetism describes the relationship between the circulation of a magnetic field along a closed path and the electric current passing through the surface enclosed by that path?”

You freeze. Your mind is almost there, trying to grab the answer from some corner not focused on the fact that Nayeon is practically naked in front of you.

“Uh…” you begin, Nayeon sways her hips as she waits. “It’s… it’s…” you struggle. Nothing. Your mind is completely blank, a screen of static.

Nayeon sighs, as if she’s genuinely disappointed. Of course she’s not. She’s having way too much fun for that.

“Need a hint?” she offers, with a smile as sweet as it is devastating.

You nod desperately. Anything, for God’s sake, anything to help!

She whispers softly, “This law introduced the concept of ‘displacement current.’”

You blink, and then, as if by some miracle, the answer comes to you. But before you can speak it aloud, Nayeon leans in again and your traitorous eyes glance at her exposed breasts.

You almost forget the answer entirely, but a slip or whatever that was makes you say, “Ampère-Maxwell’s Law,” your voice trembling, unsure if physics is about to save you or be the last nail in the coffin of your sanity.

Nayeon looks you up and down.

She approved.

Slowly, as if savoring the moment, in a exaggeratedly calculated movement, she pulls her panties down, revealing everything.

Her curves are so smooth they seem hand-carved by some Renaissance artist with a thing for naughty nerd girls. Her entire body is a work of art, every inch of her pure perfection, and as she moves closer, you feel like you’re about to lose control for good.

Nayeon sits beside you, her legs slightly apart so you can see her tight little pussy. She looks you up and down, the same look that used to seem like someone fully focused on her studies, now carrying much more obvious intentions.

"Do you like what you see?" she asks, her voice low and seductive.

You swallow hard, trying not to seem as out of control as you really are.

"Yeah... Very much..." you respond, your voice rougher than usual, and before you know it, Nayeon is leaning in closer, her body heat practically radiating onto you.

"What are you waiting for, then?" she whispers, her lips just inches from yours. The suggestion lingers in the air, and your body seems to move on its own. Your hand rises, hesitant, until it reaches her breasts, your fingers feeling the smoothness of her skin and the firmness that makes you forget about any equation or college project. You squeeze lightly, and Nayeon lets out a soft sigh that drives you even crazier.

She leans in more, her lips brushing yours in a gentle kiss. When she pulls away, her eyes are gleaming.

"I’ve always liked you, you know?" she confesses, lightly biting her lower lip as her hand slides down your chest. "I've always thought you were really hot… and smart, too. You just needed a little help focusing on what matters. You’ve got potential, you just need to get rid of the distractions."

You chuckle nervously, still trying to process what’s happening.

"I never imagined you were like this… You always seemed so… well-behaved." The words come out with difficulty, your mind still reeling between what you thought you knew about Nayeon and what you're discovering now.

She laughs softly, amused, her eyes half-closed as she replies.

"You can’t judge a book by its cover," she says, her voice almost a whispered secret, as if she’s letting you in on something few people are privileged to know.

She then pulls your hand to her waist, and you squeeze, feeling the softness of her skin, the warmth of her body under your fingers. Nayeon’s body fits against yours in a way that feels almost orchestrated. Her hands, agile and confident, slide down to your thigh, in a way that makes your breathing quicken even more.

And then you feel her touch on your groin. It’s a slow tease, and she looks into your eyes with a smile that’s almost victorious.

"Do you want me to suck you off?" she asks, her voice thick with desire.

Your heart is racing so fast you can barely think of a coherent response, but you nod, without hesitation.

"I do." The word escapes your lips, more of a groan than a response.

Nayeon smiles, that wicked smile you would never have associated with the girl who sat in the front row of the class.

"I’ve been dying to," she murmurs, the heat between you two rising with each second, promising much more than just an intellectual debate.

Nayeon kneels between your legs and prepares to take off her glasses. At that moment, it seems like the last facade of the “well-behaved nerd” is about to fall along with them. But you, in a sudden impulse of something even Freud would hesitate to analyze, reach out and say, almost automatically, “No, leave the glasses on. I like you like that.”

She stops, her fingers still hovering over the frames, and smiles in a way only someone about to change your fate could.

"Really?" She tilts her head, clearly liking the idea. Not just liking it—loving it. The kind of smile she gives you is one of someone who’s just gained a new strategic advantage in the game.

"Can you… do it… with the glasses on?" you ask, and honestly, now that the words are in the air, the question seems less weird than it should.

"Of course. If that’s what you want," Nayeon replies, the smile gaining an edge of provocation that makes you wonder if she hadn’t planned this all along.

She reaches for your pants and pulls them down along with your underwear. Nayeon touches your cock, and the sensation makes you realize how small her hands are. With incredibly soft fingers, she grips it firmly, as if evaluating something rare, a treasure she’s just found. Her eyes, still behind the lenses, look up at you.

"Wow..." she murmurs, impressed. "It’s so�� big and thick.”

If you had any chance of keeping your composure, it vanished with that sentence.

"Your hand… is so soft," you manage to say, your brain desperately trying to keep up with what’s happening.

Nayeon smiles.

"Oh, if you liked that, just wait until I put it in my mouth."

And that’s exactly what she does. Nayeon spits into her palm, the quick, indecent sound echoing in the room, and starts stroking you, her touch now sliding with the ease of something well-lubricated, almost clinical—if it weren’t absolutely pornographic.

And then, with little warning, she swallows.

Just like that. As if she’d been trained at some secret school of forbidden pleasure, her mouth wraps around your cock, warm, wet, and with a desire bordering on voracious. She looks up at you from below, her glasses still firmly in place.

You writhe in pleasure. Nothing else matters. Not the project, not life’s worries. Just Nayeon, and the way she sucks, kisses, and takes you deep, with a dedication that would make anyone believe she’s indeed “studying” something.

"I’m going to use my breasts now," she says, stopping briefly, her voice slightly hoarse, as she adjusts her breasts, squeezing them around your cock.

Ah, Nayeon’s breasts. Warm, soft, and incredibly seductive, they create the perfect “pillow” as she starts giving you a titjob. And the glasses? Still there, perfectly framing her face, turning this whole thing into an improbable, yet wonderful fantasy.

The sensation of her breasts pressing against your cock is a next-level delight. Nayeon, with a mischievous look and a voice barely above a whisper, asks, "Are you enjoying this, babe?"

You can only groan in response, the sensation so intense that words refuse to form properly. Her breasts move up and down, creating a warm, sweaty pressure that’s almost indescribable. She adjusts the rhythm.

"This is..." you manage to say, your voice hoarse and breaking. "Fuck, this is amazing."

The pleasure builds, a rising heat that seems to have a life of its own as Nayeon keeps working her magic. Her breasts, pressing and rubbing with delicious intensity, create waves of pleasure that only get stronger.

As the rhythm quickens, Nayeon gives a satisfied smile. Her breasts continue to move up and down, the sensation around your cock hot and wet, and you feel the pressure and heat mounting.

You start to squirm, the sensations growing more and more intense. The pleasure is so overwhelming it feels like your body is on the verge of exploding. Nayeon adjusts the pressure and pace, making every touch and movement you feel even more intense.

“Am I making you feel good?” Nayeon asks.

You can only nod, the feeling of being on the brink of climax almost overwhelming. Your moans become more frequent, and you can feel yourself nearing the point of no return... something Nayeon hadn’t anticipated.

Then, just as the pleasure reaches an almost unbearable level, you cum. The first spurt surprises her, landing on her face. She stays there, wide-eyed and gasping, her glasses now smeared with your semen. She accepts what happened and keeps stroking you, and the second, weaker spurt drips down onto her breasts, slowly trickling. She finishes the job by rubbing your cock on her chest, spreading your cum all over her breasts until they’re thoroughly messy. When she stops, you exhale, feeling like you’re in paradise.

“Fuck… that was so damn good, Nayeon…”

She stays still for a moment, her expression a mix of surprise and indignation. The intensity of your orgasm seems to have caught her so off guard that even she needs a moment to process it.

“Why did you cum?!” Nayeon asks, removing her glasses, her voice filled with a mix of irritation and unfulfilled desire. “You haven’t even fucked me yet!”

Breathless and slightly embarrassed, you try to defuse the situation.

“Well, take it as a compliment,” you say, a sheepish smile forming on your face. “You’re just too hot for me to handle.”

Luckily for you, this makes Nayeon smile, the irritation melting into a flush. She relaxes, though still with a teasing edge.

“Tsk. But next time, don’t cum on my glasses,” she says, her voice softer now. “But if it felt good for you, I guess I can forgive it. Just know that I’ll make sure you get hard for me again,” she says with an authority that makes her even more irresistible.

Nayeon moves closer, slowly, like a predator about to capture its prey, her eyes gleaming with a mixture of challenge and mischief. You feel the air shift as she approaches, as though the entire room is holding its breath for what’s about to happen.

“Take off your clothes,” she commands, her voice low but filled with an authority that makes you obey without hesitation.

In an instant, you’re naked, sitting on the bed, vulnerable, your heart pounding faster. Nayeon watches you, a smile spreading across her lips, like she’s admiring a masterpiece she’s about to perfect. She sits beside you with a calculated calm, and before you know it, her lips are on yours—soft at first, then more intense, as if she’s learning every inch of your mouth.

Between kisses, her hand starts exploring your body, moving slowly, until it reaches exactly where you want it most. Her fingers wrap around your cock, and the touch is... electrifying. It’s not just any touch; it’s the kind that knows exactly what it’s doing. She strokes you lightly, almost teasingly, while her lips pull away just enough for her to whisper in your ear:

“Remember that time in class when the professor asked me to help you with an assignment?” She pauses, her lips brushing lightly against your ear. “All I could think about was how much I wanted you to fuck me until I came.”

The effect of her words is immediate. Your entire body reacts before your mind can even catch up. Your cock pulses hard in her hand, almost as if it’s following an unspoken command. She feels it and giggles softly, a sound just as provocative as every move of her fingers.

“Look at you…” she says, her voice full of amusement and a hint of mockery. “You’re getting hard for me again, aren’t you? What a naughty boy.”

Your heart races, and you can hardly respond. All you can do is gaze at her while your desire skyrockets. Her hand moves slowly and deliberately, teasing every part of you, while her eyes stay locked on yours, as if savoring every second.

“How badly do you want to fuck me?” Nayeon asks, her voice soft but filled with a promise you know she’ll fulfill.

“So much,” you reply, almost breathless, anticipation taking over every inch of your being.

She smirks—that dangerous smile that says, "Exactly what I wanted to hear." Her lips return to yours, but this time there’s more urgency, a hunger building with every passing moment. Her hand moves with more intention now, and your excitement grows at an unimaginable rate.

“I knew you were like this…” she murmurs between kisses, her lips nearly glued to yours. “Such a horny little thing, always wanting more.”

She tightens her grip slightly, making you squirm, the pleasure coursing through you with every squeeze, every word whispered like a secret shared only with you.

“You like this, don’t you?” she asks, already knowing the answer. Her eyes glint as her hand continues its strategic work. “You like me teasing you.”

“Yes,” you manage to say, your voice shaky with desire.

Nayeon pulls back just enough to look into your eyes, her smile blending amusement with seduction.

“Good, because I love teasing you…” she says, then leans down, as if she’s about to do something even more daring. Her lips brush against your neck, lightly biting as her hand slides lower, teasing and gripping, leaving you on the edge of collapse.

“Think you can handle another round?” she asks, her voice now full of challenge.

“There’s only one way to find out,” you respond, trying to keep your composure but knowing you’re completely at her mercy.

“Let’s see then,” she whispers against your skin, and before you know it, she’s moving down, her lips traveling across your body, and you lean back onto the bed. She leaves a trail of kisses and bites along your chest and stomach, making her way lower.

She looks up at you, her eyes dark with desire, and with one final mischievous smile, she leans back up just enough to brush her lips against yours without fully kissing.

“Are you ready to fuck me now?” she asks.

And without a doubt, you are.

Nayeon lies back on the bed, slowly pulling you on top of her until you feel the warmth of her body against yours. The way she molds perfectly beneath you feels like she was made for this. Your hands trace the contours of her breasts, fingers pressing gently against her skin as you slide into her slowly, savoring every second. Your lips meet hers in a slow, intense kiss, tongues moving in sync with the rhythm of your hips—thrusting in and out, deepening with each stroke.

She moans against your mouth, the sound vibrating through your whole body, making you speed up a little while still keeping control. Nayeon breaks the kiss, throwing her head back, eyes closed, and you take the chance to kiss her neck, tasting the salty sheen of sweat. "You like this, don't you?" you whisper in her ear, your voice low and husky as you keep thrusting, feeling how tightly she clenches around you.

"Fuck… yes," she breathes out, her nails now digging into your back, scratching you with a mix of pain and pleasure. "Fuck me harder."

You obey without thinking, picking up the pace, each thrust deeper and more deliberate. Her moans grow louder, almost turning into screams, and it only drives you to go harder. You kiss her again, this time with more urgency, sucking her lower lip between yours as your hips move in a nearly frantic rhythm. The sound of your bodies colliding fills the room, mixed with her broken moans and your own heavy breathing.

"You're so fucking hot," you say between kisses, softly biting along her jawline as you lose yourself in the sensation. "So tight… fuck, Nayeon."

She opens her eyes, looking at you with a mix of challenge and pleasure, her face flushed and sweaty. "Come on, fuck me harder… don’t stop," she pleads, pulling you down for another kiss, this one desperate, as if she needs every touch of yours to survive. You oblige, thrusting harder, while her moans turn into muffled cries as your mouths stay connected.

But then, you decide to switch positions. Science, after all, is about experimentation. You position her at the edge of the bed, Nayeon's legs lifted and spread wide, her pussy on full display—pink and pulsing, inviting. The sight makes you lose control for a moment as you grab her thighs, pulling her closer to you. With one hand, you line up your cock, the tip already slick with excitement, before sliding it inside, feeling the warmth wrap around you completely. The sound of skin slapping against skin echoes through the room, mingling with both your moans.

Nayeon looks up at you, a wild gleam in her eyes, completely different from the girl everyone thinks they know. "You're such a filthy pervert," she growls through gritted teeth, her voice low and dripping with lust. "Fucking your study partner like this, so dirty… Do you see what you've done to me? The little nerd everyone thinks is so innocent, and look where I am now, all spread out for you…"

The sound of her voice, the moans slipping out as you fuck her harder and deeper, only makes you lose more control. "Innocent?" you mutter, your breathing ragged. "You pretend to be the good little student, but with me, you love being a slut, don’t you?"

She lets out a wicked laugh, cut off by a louder moan as you thrust even deeper. "I fucking love it. I love how you make me forget everything… I love being your little slut. I’m all yours, and you can do whatever you want to me."

Your movements grow faster, each thrust pulling louder moans from her. You grip her thighs tight, pulling her into you with each thrust, your eyes fixed on the sight of your cock sliding in and out, completely soaked. "Look at you," you growl, your voice dripping with taunt. "So depraved… No one would guess that the nerdy girl from class is here, begging to be fucked like a whore."

Nayeon lets out a long, drawn-out moan, almost a scream, her body arching beneath you, fingers gripping the sheets tightly. "Yes! Fuck me harder, fuck! I want you to know this is what I love… I love being the little nerd only you can fuck like this. Faster, harder!"

You don't hesitate, your hips slamming against hers in a frenzied pace, the heat and pressure of every thrust consuming you both. Her legs tremble, and you keep pounding with force and precision. "Admit it, Nayeon," you say through gritted teeth, picking up the pace. "You love being my little slut…"

She opens her eyes, staring at you with an almost possessive intensity. "Fuck, yes! I’m your slut. Fuck me more, fuck my pussy like I’m only yours…" You lower yourself onto her, kissing her hard, pouring every bit of your heat into her through the kiss as you keep thrusting, and between desperate, erratic kisses, she gasps, "Take me from behind now. I want you deep inside me, you filthy pervert!”

You pull away from her, and Nayeon promptly positions herself on your messy bed, arching her back, ready. Your approach is almost reverent. You position yourself behind her as you lower your head slowly, your eyes tracing the sight she offers—her wet pussy, swollen with excitement, and just above, her tight little ass, teasing you. She’s so exposed, so vulnerable, yet there’s a confidence in her, like she’s fully aware of what’s coming. And that’s exactly what turns her on.

Before making a move, you let your warm breath brush against her skin, sending shivers through her body. Nayeon lets out a shaky sigh, and her back arches even more. “Don’t make me wait…” she murmurs, a mix of urgency and need in her voice.

With a sly grin, you lower your mouth, and your tongue finally touches the slick entrance of her pussy. The taste is addictive, just as you suspected. You start with soft, long licks, gliding along the length of her lips, savoring every drop of her juices. Nayeon responds immediately, letting out quiet moans, her breathing already quickening.

“You… know exactly what you’re doing, don’t you?” she asks, her voice broken by little gasps.

You chuckle lightly between licks but don’t answer. Your hands firmly grip Nayeon’s ass, keeping her in place as your tongue slides deeper, exploring her sensitive folds. Each time you graze the entrance of her pussy, it clenches, almost begging to be filled, but you refuse to give her everything at once. Instead, you decide to tease her even more.

Sliding your tongue upward, you slowly trace circles around her tight little asshole, making it wet with your saliva. The reaction is instant—Nayeon’s body trembles, and her moans intensify. “Oh my God… keep going… please…” she whispers, her voice a desperate plea.

You alternate between quick, gentle licks, sometimes focusing on her swollen, slick pussy, other times on her sensitive ass, driving her to the brink of losing control. Your tongue dances between the two spots, teasing and pleasing her at the same time. With every new touch, Nayeon’s moans grow louder, more urgent.

“You… you like this, don’t you, you pervert?” she asks with a muffled voice, her hands gripping the bed sheets tightly.

“I love how you taste,” you murmur against her skin.

She lets out a breathy laugh, somewhere between pleasure and disbelief. “Of course you do, I’m… delicious.” And you can’t help but agree. Your tongue continues to explore, licking deep into her pussy and then sliding up to her ass, enjoying the way her body reacts to every touch. Your fingers dig into her ass cheeks harder, leaving red marks on her pale skin.

Nayeon’s moans mix with uncontrollable whispers, each word escaping between ragged breaths. “Please… you’re killing me,” she begs, her voice thick with pleasure, her eyes half-closed in pure lust. “Fuck me… just fuck me already!”

Her plea is desperate, loaded with an almost imperious urgency, and you, with a mischievous smile, position yourself behind her, watching as she pushes her ass higher, her slick pussy begging for more. “You sure you can take it?” you tease, your hands already gripping her hips, but before she can even respond, you pull her back, aligning yourself with precision, the head of your cock brushing against her lips.

“Just do it, fuck,” Nayeon shouts, her tone commanding but dripping with so much desire that you can’t resist. In one swift motion, you thrust into her, and the wet heat of her pussy envelops you completely. Pleasure shoots through you like an electric current, and she arches her back, pushing against you, as if begging you to go deeper, faster.

You start slowly, savoring each thrust, each inch sliding in and out of her, but soon the pace picks up, driven by the uncontrollable moans pouring out of Nayeon. “Faster… harder,” she moans, her voice faltering with each deeper thrust, and you don’t hesitate. Your hands sink into the soft flesh of her hips, holding her steady as you speed up, the thrusts becoming more intense, more brutal.

“Look at you, so prim and proper in class, but here…” you say between thrusts, the sound of skin slapping against skin filling the room. “Here you’re just my little slut. The nerd who loves being fucked like a whore.”

Nayeon moans loudly, her voice breaking into wicked laughter. “Is that what you want, huh? To know the nerd loves being fucked like this, like a depraved little slut… Make me scream, fuck!”

With each slap to her ass, she moans louder, her pale skin turning red with every hit. “Hit me harder,” she begs, her eyes gleaming with pleasure, her voice a mix of desperation and ecstasy. And you oblige, slapping her harder, leaving red marks as you bury yourself deeper inside her.

“You’re an unbelievable slut,” you growl, picking up the pace, each thrust drawing louder and more desperate moans from her. “You pretend to be so good, but look at you now… begging for more.”

“I’m your slut,” she screams, pushing her ass back against you even harder. “Do whatever you want with me… I love being fucked like this, fuck! Make me yours, make me cum.”

You keep going, your thrusts becoming frenzied, your hips moving with an uncontrollable speed and intensity. “Fuck, look at you,” you taunt, feeling your own pleasure building. “You love being treated like this, like a desperate little whore. Scream for me, Nayeon.”

“Yes, yes!” she screams, her voice thick with pleasure, almost hoarse. “Fuck me until I can’t take it anymore, babe!”

Her body trembling as her climax approaches. Suddenly, she arches her back, pushing her ass harder against you, and her voice cracks as she screams, “I’m... going... to cum!”

Her pussy clenches tightly around your cock, pulsing and shaking as she’s overtaken by the orgasm, her whole body shuddering in ecstasy while your relentless thrusts continue. But you don't stop. Her pleasure only drives you further, each thrust pulling everything out of her, Nayeon’s body writhing, each scream feeding your own growing desire.

“Yeah… Fuck me, make me yours,” she keeps begging, even in the middle of her own climax, completely surrendered to the sensation.

You can feel your own orgasm building, heat rising fast, pressure mounting. “I’m going to cum,” you warn, your voice rough and broken, unable to stop as the final thrusts send you both over the edge.

The feeling of her pulsating pussy around your cock pushes you to the brink, and with one last frustrated groan, you pull out. Nayeon gasps for a moment, recovering from her orgasm as she kneels down on the floor, almost like she already knows what to do – and, honestly, she does. Her eyes lock on you, her face slightly flushed, and her mouth already open, waiting eagerly like the diligent student she is.

You grip your cock with one hand, still throbbing, and bring it to her lips. With her mouth wide, Nayeon wraps her lips around you once more, sucking softly with a gentleness that almost belies the fevered desire etched across her face. You pull out of her mouth, stroking yourself quickly, feeling the pressure mounting further.

Nayeon waits, obedient, with her tongue stretched out, her eyes hungry and fixed on you, knowing exactly the effect that has on you. When the moment hits, the first spurt of cum lands on her warm tongue, and Nayeon doesn’t even blink. She takes it all in with pleasure, as you empty yourself into her mouth, your body shuddering, nearly out of control.

She keeps her mouth open the entire time, her tongue coated in your cum, and when you finally finish, she closes her lips, licking them as the taste spreads. With perfect manners, she shows you her full mouth, eyes full of playful mischief, and then, without breaking eye contact, she swallows it all in one gulp, her throat moving slowly.

“See?” she says with a satisfied smile, as if she’d just passed a test with flying colors. “I swallowed it all without spilling a drop.”

But, of course, Nayeon, ever the overachiever, wasn’t finished. Before you can catch your breath, she leans in again, taking your sensitive cock into her mouth, sucking with an intensity that makes you moan involuntarily. The jolt of pleasure is so sharp that you try to pull away, your body trembling, but she holds you firmly, her mouth working at a pace that borders on cruel.

“Fuck!... I can’t take any more!” you try to protest, your voice breaking, but Nayeon just hums in response, pulling you out only long enough to say, “Not yet,” before closing her lips around you again, sucking you until, finally, she decides she’s satisfied.

When she releases you, you’re left gasping, almost paralyzed from the intensity of it all. Nayeon smiles sweetly, victorious, wiping the corner of her mouth with her fingers before saying with calm satisfaction, “Mmm, Now that was delicious.”

—

As you desperately gulp water from your bottle, the silence that follows your impromptu "study session" lingers heavily in the air, a strange return to reality. Nayeon had stood up, her hair still slightly messy and a small smile playing on her lips, before heading to the bathroom. She walked with the confidence of someone who had just solved a particularly tricky math problem.

And now you're here, staring at the bathroom door, listening to the sound of water as she washes her face and cleans her glasses, removing any trace of... well, *you*. Then, because life loves to remind you that nothing is ever simple, your mind starts to wander. What, exactly, just happened? Oh, right. You were working on a project. A project that, incidentally, hasn’t moved an inch forward.

Nayeon steps out of the bathroom, picking up the discarded clothes from the floor, dressing herself piece by piece, taking her time, like you were a couple with decades of shared intimacy. She finishes by adjusting her glasses, almost like she’s putting a crown back on after a victorious battle. She sits back down in her chair, opens the laptop as if nothing had happened, and lets out a satisfied but determined sigh.

“Alright,” she says, as if she hadn’t just left you weak-kneed. “Let’s get back to the project.”

You stare at her, incredulous. As if it were possible to get back to the project after that.

And then you realize you’re still naked. You quickly slip on your boxers and pants.

“To be honest, I don’t think I can focus on my part right now,” you admit, your voice still a bit hoarse.

“Don’t worry. I’ll take care of everything.” She smiles that smile—a mix of mischief and... surprisingly efficient academic prowess. “As long as you keep fucking me, of course. I have to be rewarded somehow.”

You’re speechless for a moment, because, well... you don’t exactly have a counterargument. In fact, it seems like the best deal you’ve ever made in your life.

“Deal,” you say, trying to sound cool, as if you weren’t absolutely thrilled by the arrangement.

Inside, though, you’re jumping for joy.

She adjusts her glasses, watching you for a moment, and you notice that glint in her eyes—a mix of ego, intelligence, and... something else that makes your heart race. Or maybe it’s just the recent sex.

Hard to say.

“But,” she cuts through your thoughts with a serious tone, “no one can know about this. We have to meet in secret. No telling anyone.”

“I swear I won’t tell.”

You wonder how you ended up in this situation, but the answer seems obvious. Who in their right mind would turn down a request like that?

She smiles, satisfied, and turns her attention back to the laptop, as if everything were perfectly resolved.

“Besides,” Nayeon adds, without looking up, “if you need help with any other subject, you can count on me. After all, I think we work well together, don’t we?”

You just nod, but there’s something about her—something between the proud nerd and the bold confidence—that drives you wild. Wild with desire, of course, but also something deeper. And as you watch her, so focused, adjusting her glasses like she’s planning the next phase of a secret mission, you realize that you’re falling for the class nerd.

Yes, she’s hot. Yes, she has a way of disarming you at every turn.

But it’s more than that. It’s as if every time she looks at you with that “know-it-all” air or talks about a complicated academic concept, your mind equates it with something incredibly sexy. And suddenly, your love life has turned into an equation you can’t—and don’t want to—solve.

And, of course, the fact that she’s amazing in bed doesn’t hurt, either.

“Should we meet tomorrow?” you ask casually.

Nayeon doesn’t even look up, just gives a small “mm-hmm” of confirmation, her fingers still typing away.

“Your place again. Same time. Clean up your room... And answer the door in your boxers.”

She glances at you slightly, smiling, and you know exactly what that smile means. And, well, you’re not in any position to complain. In fact, if studying had always been like this, maybe you'd have been the best student in class.

—

As you walk Nayeon to the door, you can’t help but think that maybe you’ve uncovered the true secret to academic success. And who would have thought it was a sexy nerd with glasses who secretly turned out to be a naughty girl who liked sneaking off for sex?

As she leaves, you can’t help but smile when your eyes meet one last time. Not just because of the deal you’ve just made, but because, for the first time in a long while, you’re genuinely excited to "study" with someone. Suddenly, the academic world seems a lot more interesting.

You close the door, but something lingers in the air. Maybe it’s the smell of your sweat—you still haven’t showered, after all. Maybe it’s the trace of Nayeon’s perfume. Or maybe, just maybe, it’s the beginning of one of the most unexpectedly erotic adventures of your life.

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A/n: Please forgive any typos or grammatical errors, English is not my first language. Thanks for reading.

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