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jupiterpilgrim · 1 month ago

Text

A+ Affair

Yunjin x Male Reader

word count: 11K

[commissioned fic]

The clock on your phone reads five minutes past the hour, and you’re already muttering under your breath as you jog down the hallway, adjusting your messenger bag over one shoulder. Of course, the one time you get assigned a one-on-one consultancy, you’re late. It’s not even your fault—you’d spent the last hour drowning in administrative work, filing reports no one was likely to read, all while wondering why someone thought a graduate student with no actual teaching experience would be the perfect fit to guide an undergrad. But here you are, running behind and feeling grossly underprepared.

When you finally reach the office, your hand hovers over the door handle as you suck in a breath, trying to pull yourself together. You’re supposed to look like you know what you’re doing. Confidence, right? Even if your experience as a teaching assistant has mostly involved stapling worksheets and running occasional errands. This is different—real academic guidance. A chance to prove yourself.

You push open the door, already apologizing before you’ve even looked up.

“Sorry, sorry, I lost track of time—oh.”

Your words catch, and you blink once, twice, to make sure your eyes aren’t playing tricks on you.

She’s sitting sideways in the chair, one leg crossed over the other, her fingers lazily scrolling through her phone like she doesn’t have a care in the world. Her hair gleams under the fluorescent lighting, every strand impossibly perfect, cascading over her shoulders. She’s wearing a bright, skintight top that clings to her frame, paired with a skirt so short you almost feel scandalized just looking at it. Her legs are bare, crossed just enough to hide anything too revealing, but her thighs look smooth and soft, the kind of thighs that command attention. Her lips—God, her lips are plump, painted in a glossy pink that makes them impossible to ignore.

She doesn’t even notice you’re there.

You hesitate for a moment, unsure how to proceed. The room feels smaller somehow, warmer, even though she hasn’t looked up from her phone. You straighten your back, pull your bag strap tighter over your shoulder, and clear your throat.

“Uh, hi. I’m, uh—” You stop, mentally berating yourself for sounding like a nervous freshman on their first day. You start again, your voice steadier. “Hi. I’m your teaching assistant, and I’ll be helping you with your exam prep.”

That gets her attention. She looks up, her lips curving into a slow smile as she sets her phone on the desk.

“Oh, hey. Didn’t see you come in.” Her voice is casual, breezy, like she’s greeting an old friend instead of her academic consultant.

“Right. Uh, sorry about being late. That’s on me.” You glance at the desk, trying to focus on the papers and not the way her eyes seem to linger on you for just a moment too long. “Let’s get started.”

“No worries.” She leans back in her chair, her posture relaxed, one leg bouncing slightly as if the whole situation is no big deal to her. “I’m Yunjin, by the way. But I guess you already knew that.”

You nod, forcing yourself to keep your tone professional. “Yeah, I reviewed your file. I'm here to help you prepare for the upcoming exam.”

“Sure, sure. Honestly, I’m just here ‘cause they said I had to be. You know how it is.”

Your brow furrows slightly. “Your grades suggest you might need more than just attendance to pass this exam. I was involved in developing the questions and the material isn’t exactly light.”

Her smile doesn’t falter, but there’s a glint of something playful in her eyes now, like she’s toying with you. “You don’t have to give me the hard sell, professor.” She says it with a teasing lilt, like she knows exactly how much the title doesn’t fit you. “Let’s just get this over with, yeah?”

You stiffen slightly, trying not to let her casual attitude get under your skin. “I’m not a professor, but I take this seriously, and you should too. Business isn’t a subject you can bluff your way through.”

“Mm, I don’t know about that,” she murmurs, tilting her head as she watches you. Her gaze is uncomfortably direct, like she’s sizing you up. “A lot of it’s just networking, right? Who you know, how you present yourself. Pretty sure I’ve got that part down.”

You don’t respond immediately, your focus shifting to the materials in your bag. Her attitude is frustrating, but you remind yourself this is your job—to help, even if the student in question doesn’t seem particularly interested in being helped. You pull out a stack of notes and a syllabus, spreading them on the desk between you.

“All right,” you say, adopting a firmer tone. “This is the outline of what we’ll be covering. We’ll start with foundational concepts—market analysis, competitive strategy—and work our way up to application-based scenarios.”

She picks up one of the papers, glancing at it briefly before setting it back down. “Sounds… riveting,” she says dryly, her lips curving into a faint smirk. “You really love this stuff, huh?”

“It’s important,” you reply, keeping your tone neutral. “And it’ll be on the exam, so—”

“Relax,” she interrupts, leaning forward slightly. Her top shifts just enough to reveal a hint of lace beneath, a flash of black that’s gone as quickly as it appeared. “I’ll pass. I always do.”

You don’t let your gaze linger, but your pulse quickens despite yourself. You force yourself to look at her face, to keep your tone professional. “I'm not here to magically make you pass. The goal is understanding the material. Mastering it.”

“Right,” she says, drawing out the word like she’s indulging you. She rests her chin on her hand, her gaze never leaving yours. “So, how old are you anyway? You don’t look much older than me.”

The question catches you off guard, you hesitate, but tell her your age.

“See?” She grins, leaning back again. “We’re practically the same age. Makes it easier to talk, don’t you think?”

You clear your throat, glancing at the clock. “We should get started. The sooner we dive into the material, the more ground we can cover.”

She shrugs, her smile never fading. “Whatever you say, prof. Lead the way.”

You try to ignore the way she’s looking at you, the playful edge in her tone.

The first ten minutes of the session feel like pulling teeth. You dive into market segmentation with the kind of energy you hope comes off as confident and not desperate. But Yunjin doesn’t seem remotely interested. She’s sprawled out in her chair, phone in hand, her fingers flying across the screen as if this is just a brief interlude in her far more important day.

“So, breaking down a market into segments allows businesses to—”

“Hold up,” she interrupts, barely looking up. “I just need to reply to this real quick.”

Your jaw tightens, but you take a breath, forcing patience. “Yunjin, we only have an hour. The more you focus, the more we can cover.”

“This is focusing,” she says, glancing up with a grin that’s as unapologetic as it is infuriating. “Social media is huge for business. You know that, right? I’ve got to stay active. Engagement is everything.”

You fold your arms, trying to keep your expression neutral. “I don’t think Instagram is going to help you pass your exam.”

“Not Instagram,” she says, her tone lightly mocking. “TikTok. Way bigger reach. I have, like, a hundred thousand followers, by the way. Do you follow me?”

“I don’t have TikTok,” you reply, too quickly.

She raises an eyebrow, like she doesn’t quite believe you. “Seriously? You’re missing out. I bet you’d love my stuff.” She leans forward, flipping her phone around to show you her profile. The screen lights up with videos of her dancing, lip-syncing, or simply posing in various trendy outfits. Her most recent one is captioned ‘CEO vibes only 💼✨’, and she’s twirling in what you think is supposed to be business attire, though it’s as tight and revealing as the clothes she is wearing now.

“That’s… impressive,” you say cautiously, unsure what else to offer.

“Right?” She beams, clearly pleased with herself. “This kind of thing is my future. Marketing, personal branding, the whole package.”

“That’s great, but right now, we’re focusing on your coursework. Market segmentation—”

“Oh, my God, you sound like a textbook,” she says with a laugh, leaning back again. Her skirt rides up just a little higher, and you force yourself to look at your notes instead. “Loosen up, professor. Ever heard of a work-life balance?”

“I’m not a professor,” you mutter under your breath, flipping through the syllabus for the next point.

She doesn’t hear you—or pretends not to. Instead, she picks up her phone again, her attention already elsewhere. You press your lips into a thin line, determined to steer the session back on track.

“All right,” you say, keeping your voice firm. “Let’s try a practical example. Imagine you’re launching a new product. How would you identify your target market?”

She hums thoughtfully, but her focus stays on her phone. “Depends. Am I selling something cute? Sexy? Or, like, functional?”

“Something practical,” you say, trying to engage her. “Let’s say a new line of eco-friendly water bottles.”

She finally looks up, her brow furrowing slightly. “Boring. Can’t we do, like, makeup or clothes or something?”

“Fine,” you relent. “A new line of cosmetics.”

“Now we’re talking.” She sits up straighter, crossing her legs. The movement draws your attention for half a second too long, your eyes flickering to her thighs before you realize what you’re doing. You snap your gaze back to the syllabus, your heart thudding in your chest.

But it’s too late.

“You looking at something, professor?” she teases, her voice light, almost singsong.

You glance up, heat flooding your face. She’s smirking now, her lips curving in a way that makes your stomach twist.

“I was just—” You scramble for an excuse, but she cuts you off.

“It’s fine,” she says, leaning her chin on her hand, her eyes sparkling with amusement. “You don’t have to be so uptight, you know. We’re both adults here.”

You clear your throat, determined to move past the moment. “Let’s stay on topic. Target markets. Who’s buying your cosmetics?”

She shrugs, clearly unfazed. “Everyone. Duh.”

“That’s too broad,” you counter, grateful for the distraction. “You need to narrow it down. Focus on specific demographics.”

“Okay, fine.” She pretends to think for a moment, twirling a strand of hair around her finger. “Women in their twenties, I guess. Maybe teens, if it’s affordable. Oh, and influencers, obviously.”

“Good,” you say, nodding. “And how do you reach them?”

“Social media,” she says instantly, her confidence returning. “Instagram, TikTok, YouTube—wherever they’re scrolling.”

“Exactly,” you say, hoping to keep the momentum going. “And what about pricing strategy?”

“Cheap enough to buy, but expensive enough to look fancy,” she says, her lips quirking into a grin. “See? I’m not totally clueless.”

You can’t help but smile, despite yourself. “No, you’re not. But there’s still a lot to cover, and the clock’s ticking.”

“Then we’d better hurry,” she says, though her tone is far from urgent. She picks up her phone again, glancing at the screen before setting it back down with a sigh. “Okay, professor. Teach me.”

You shake your head, already bracing for the next distraction. This session is going to test every ounce of your patience.

—

Your bachelor apartment is the definition of bare-bones living. A twin bed shoved against one wall, a battered desk holding your overworked laptop, a couple of mismatched chairs around a table that’s seen better days. The faint hum of traffic from the campus filters through the window you’ve cracked open to keep the place from feeling too stuffy. You kick your shoes off, tossing your bag onto the floor with a weary sigh. It’s been one of those days—endless errands, an exhausting afternoon of pretending you’re more qualified than you are, and, of course, Yunjin.

She’s been stuck in your head since you left the office. Not intentionally—God, no. But something about her lingers. Maybe it’s the way she never takes anything seriously, or the way she seems so effortlessly self-assured. Like nothing in the world could possibly rattle her. It’s frustrating and impressive all at once.

You collapse onto the bed, staring at the ceiling. Yunjin. You know her type, the popular girls who glide through life on charm and good looks, who never have to try as hard as everyone else because people are just drawn to them. You’ve met girls like her before—confident, flirty, always with one eye on their phone. She’s not stupid, though. That much is clear. If anything, she’s sharp in a way that’s hard to pin down. She knows how to navigate people, situations. She knows exactly how much effort to put in to get what she wants and no more.

Your phone buzzes on the bedside table, snapping you out of your thoughts. You pick it up, scrolling aimlessly through emails, notifications, news articles—anything to distract yourself. But your mind keeps circling back. What was it she said earlier? About TikTok?

Before you can second-guess yourself, your fingers are typing the app into the search bar, downloading it in seconds. The interface is unfamiliar at first, a stream of random videos you don’t care about flashing across the screen. But it doesn’t take long to find her.

There she is. Yunjin.__official. The profile picture is exactly what you’d expect—her smiling, hair perfect, lips glossy. Her bio reads: Business student | DM for collabs. She has over a hundred thousand followers.

Your thumb hovers for a moment before you tap on her profile. The screen fills with a grid of her videos, each one a window into her carefully curated world. You tell yourself it’s just curiosity, harmless research. Nothing more.

The first video you watch is one of her dancing in her room, the camera propped up to capture every move. She’s good, you realize, her body moving fluidly, every motion precise and confident. She’s wearing workout gear—tight leggings, a cropped top—and the way the fabric clings to her curves is impossible to ignore.

You swipe to the next video. This one’s more playful, her lip-syncing to some trending audio while twirling in a skirt that flares out with every spin. The lighting is perfect, her makeup flawless, her smile dazzling.

Another video. This time she’s at a party, surrounded by friends, laughing and holding up a cocktail. The camera focuses on her as she leans in close, her expression mischievous, like she’s sharing a secret with the viewer.

You watch another. Then another.

Each one is different, but they all share the same energy—bright, vibrant, captivating. It’s no wonder she’s amassed such a following. She knows exactly how to play to the camera, how to draw people in.

Your gaze lingers a little too long on one video where she’s wearing a bikini, lounging by a pool. Her legs stretch out, her skin glistening in the sunlight. She flips her hair back, laughing at something offscreen, and for a moment, you forget to breathe.

You snap your phone shut like it’s burned you, your heart pounding. What the hell are you doing?

This is stupid. It’s late, and you’re tired, and wasting time on a student’s TikTok profile isn’t just unprofessional—it’s downright pathetic. You toss your phone onto the bedside table, rolling onto your back and running a hand over your face.

Your apartment is too quiet now, the silence pressing down on you. You close your eyes, willing yourself to think of something else. Anything else.

It takes longer than it should, but eventually, sleep claims you.

—

The next meeting starts much the same as the last—her sitting in the chair like she owns the room, one leg crossed over the other, scrolling through her phone with that same carefree attitude. You, on the other hand, feel like a bundle of nerves disguised as authority. But this time, you’ve come prepared.

“Hey, professor,” she says without looking up, her voice dripping with casual familiarity.

You close the door behind you, shaking your head. “Still not a professor.”

She grins, finally putting her phone face-down on the desk. “What’s up? Ready for another thrilling lecture?”

“I hope you’re ready,” you reply, pulling out a folder and setting it on the desk between you. “Did you study the material we went over last time?”

“Of course,” she says, all bright confidence. “I’m a great multitasker. I was studying while managing my social media. Killed two birds with one stone.”

You narrow your eyes slightly, not buying it for a second. “Right. Let’s see how much of it stuck.”

She raises an eyebrow, leaning forward. “What’s that supposed to mean?”

You pull out a single-page worksheet, sliding it across the desk toward her. “It means I put together a quick assignment to see where you’re at. Shouldn’t take more than fifteen minutes if you really studied.”

The grin drops from her face, replaced by a look of mock outrage. “You’re kidding.”

“I’m not.”

She picks up the sheet, scanning it quickly. “This looks like… work. Like actual work.”

“That’s because it is.” You cross your arms, leaning against the desk. “If you want to pass the exam, you need to prove you understand the material. And this is a good way to do that.”

“Ugh, you’re such a hardass,” she groans, slumping back in her chair dramatically.

You bite back a smile. “I’ll take that as a compliment.”

She sets the sheet down, giving you a long, appraising look. “You really aren’t gonna let me off the hook, huh?”

“Nope.”

“Not even if I—” She stops, her lips curving into a sly smile as if she’s considering something. But then she shrugs, brushing it off. “Whatever. Fine. I’ll do it.”

“Good.” You hand her a pen, feeling a small sense of victory.

She takes it with a sigh, tapping the end against the desk as she glances at the first question. “This is such a buzzkill, you know that? You’re lucky I’m in a good mood.”

“Lucky me,” you deadpan, pulling out your own notes to review while she works.

For the next few minutes, the room is quiet except for the scratch of her pen against the paper. You glance up occasionally, trying to gauge her progress. She looks focused enough—her brows furrowed slightly, lips pursed in concentration—but there’s still a glint of mischief in her eyes whenever she glances your way.

After about ten minutes, she sets the pen down with a flourish. “Done. Happy now?”

“Let’s find out.” You pick up the sheet, scanning her answers. They’re… not terrible. A little rushed, a little surface-level, but not the disaster you were expecting.

“Well?” she prompts, leaning her chin on her hand. “Did I pass the pop quiz?”

“You did… okay,” you admit. “There’s room for improvement, but it’s a start.”

She beams, like you just handed her an A. “See? Told you I was a multitasking queen.”

You roll your eyes, setting the sheet down. “This isn’t about just getting by, Yunjin. If you actually put in the effort, you could do really well in this course. Maybe even excel.”

“Mm, but where’s the fun in that?” she teases, her tone light but her gaze sharper than usual. “You’re so serious all the time. Don’t you ever just… I don’t know, relax?”

“This isn’t about me,” you reply, sidestepping the question. “This is about you passing your exam.”

She leans back, her smile widening. “You’re really committed to this whole responsible TA thing, huh? It’s kind of cute.”

You stiffen slightly at the word, but she doesn’t give you time to respond.

“Don’t worry,” she adds, grabbing her phone and flipping it over in her hands. “Like I said: I’ll pass. I always do.”

You let out a breath, half-exasperated, half-resigned. “You can’t just coast through everything, Yunjin.”

“Why not?” she asks, her tone light but her gaze steady. “It’s been working pretty well so far.”

You open your mouth to argue, but the words catch in your throat. For a moment, it feels like she’s challenging you, testing you, waiting to see how far you’ll push back.

You clear your throat, breaking the tension. “Next time, we’ll cover case studies. Real-world applications.”

She laughs, standing and stretching lazily. “Sure thing, professor. Can’t wait.”

As she walks out, phone already in hand, you sigh in relief that this session is over.

—

The apartment feels particularly quiet tonight, the faint hum of your desk lamp filling the space as you sift through a mountain of notes and research papers. It’s Friday, but for you, that doesn’t mean a night out or some kind of social escapade. It means working on your thesis, chipping away at the endless grind that defines grad school life. A cup of lukewarm coffee sits forgotten by your elbow, the words on the page starting to blur together.

Your phone buzzes against the table, a sudden break in the monotony. You glance at the screen, expecting some automated notification or maybe a text from one of your few friends. Instead, it’s from Yunjin.

Hey, I need your opinion on something.

You blink at the message, confused. It’s late—too late for anything academic, and even if it weren’t, why would she need your opinion? You tap out a quick reply, keeping it neutral.

I think you sent this to the wrong person.

Her response comes almost immediately.

Nope. It’s for you. You’re my TA, right? You’re supposed to help me with stuff.

You frown, staring at the screen. This has nothing to do with schoolwork. You type back, trying to keep your tone professional.

My number is for college purposes only. If you have a question about the material, we can go over it during our next session.

But she’s not backing down.

This is important. What should I wear to a party?

Before you can even think of how to respond, a picture pops up in the chat.

It’s her, of course. She’s standing in front of a mirror, holding her phone up to capture the shot. She’s wearing a tight, shimmery silver dress that clings to her body, hugging her curves in a way that makes it impossible to look away. Her hair falls perfectly over her shoulders, and the slit in the dress shows off one of her legs, long and toned.

Your mouth goes dry, and you look away from the screen, as if that might undo the fact that you’ve seen it. Another buzz.

Or this one?

You glance back despite yourself. The next picture shows her in a cropped black top and a leather mini skirt, her midriff on full display. Her lips are slightly parted in the photo, her eyes half-lidded, like she’s halfway into the party already.

You sit back in your chair, running a hand over your face. What the hell is she doing? This is completely inappropriate. You’re her teaching assistant, not her personal stylist. You type out another reply, this one more curt.

Yunjin, this isn’t appropriate. My role is strictly academic. I can’t help you with this.

But she’s relentless.

Relax, it’s no big deal. Just tell me which one’s better. It’s not like I’m asking you to come to the party.

Your phone buzzes again. A third picture.

This time, she’s in a red dress that’s somehow even more daring than the others. The neckline plunges low, the hemline barely brushing her thighs. She’s biting her lip in this one, a playful glint in her eyes that makes your stomach twist.

You clench your jaw, forcing yourself to focus. You’re not going to get dragged into whatever game she’s playing. You reply quickly, keeping your tone as detached as possible.

The black one is fine. Have fun.

Her response comes almost instantly.

I knew you’d like that one 😏

You exhale sharply, annoyed at yourself for even engaging with this. Your hands hover over the keyboard, trying to think of a way to end this conversation. But before you can, another message pops up.

I already miss our fun study sessions, you know. You’re so serious all the time—it’s cute.

You grip your phone tightly, trying to keep your temper in check. She’s toying with you, that much is obvious. You remind yourself she’s just a student—an infuriating, distracting student who doesn’t seem to understand boundaries.

Don’t party too hard. And remember to study.

Her reply is quick, as if she’s been waiting for it.

You’re such a buzzkill, professor. See you next week 😘

You set your phone down, staring at it like it might explode. Things are only getting worse, and you fear what's yet to come.

—

The moment you step into the office, you’re greeted by the familiar sight of Yunjin lounging in her chair like she’s waiting for a casual coffee date, not an academic session. Today, her outfit is as striking as ever—a snug, low-cut blouse paired with a skirt that rides just high enough to make you uncomfortable. She’s scrolling through her phone, as always, her attention miles away from the materials you’ve prepared.

“Good afternoon,” you say, trying to inject some authority into your tone as you set your bag down on the desk.

She glances up briefly, flashing you that disarming smile. “Hey, professor.”

“Not a professor,” you mutter, shaking your head. “Ready to get started?”

“Always,” she replies, but the way she lazily props her chin on her hand suggests otherwise.

You pull out the case study you’ve prepared, laying out the printed pages in front of you. “Today, we’re focusing on real-world applications. Case studies are a key part of the exam, so—”

Her phone buzzes, and she glances down, her fingers flying across the screen as she types out a reply. You stop mid-sentence, your patience already wearing thin.

“Yunjin,” you say sharply, and her eyes flick up to meet yours, wide and innocent.

“What? I’m listening.”

“No, you’re not. You’re on your phone. Again.”

She smirks, leaning back in her chair. “Okay, okay, you caught me. But in my defense, multitasking is a valuable skill in business, right?”

You pinch the bridge of your nose, exhaling slowly. “You need to focus. This material is important, and if you don’t take it seriously, you’re going to fail.”

She pouts, tilting her head to the side. “Maybe it’s just hard to focus because you’re way over there. Don’t you think it’d be easier if you sat next to me?”

You hesitate, eyeing the empty chair beside her. There’s something about the way she’s looking at you—half-teasing, half-challenging—that makes your skin prickle. But you can’t think of a valid excuse to say no, so with a resigned sigh, you pick up your notes and move to the seat beside her.

“Happy now?” you ask, your tone clipped.

“Much,” she says, her lips curving into a satisfied smile.

You try to steer the session back on track, pointing to the first section of the case study. “This example looks at how a small business expanded its market share by identifying underserved demographics—”

“Do I make you nervous?” she interrupts, her voice low and almost playful.

You freeze for a split second, caught off guard. “What?”

She leans in slightly, her hair brushing her shoulder as she studies you with an amused glint in her eyes. “You seem a little tense. Like I’m throwing you off your game.”

“I’m not nervous,” you reply stiffly, focusing on the papers in front of you.

“Mm-hmm,” she hums, clearly unconvinced. Her hand shifts on the table, and for a moment, her fingers brush against yours—light, fleeting, but enough to send a jolt through you.

You pull your hand back, pretending to adjust the papers. “Can we focus, please?”

“I am focused,” she says, feigning innocence. “But you’re not making it easy. Maybe if you loosened up a little—”

“Yunjin,” you cut her off, your tone sharper than you intended. “This isn’t a game. Either you take this seriously, or we’re wasting both our time.”

She blinks at you, her lips parting in mock surprise. “Wow, look at you, laying down the law. That’s kind of hot.”

You ignore the comment, flipping to the next section of the case study. “This part covers the importance of pricing strategy in competitive markets. I want you to read through it and summarize the key points.”

“Ugh, homework, really?” she groans, slumping in her chair.

“It’s not homework. It’s research,” you correct. “I expect you to come back with a full summary by—”

“Can’t I have, like, a week?” she interrupts, her tone dripping with exaggerated pleading.

“No,” you say firmly. “Three days.”

“Three days? Are you serious?”

“Yes. And if you keep complaining, I’ll make it two.”

Her eyes narrow, but there’s a spark of amusement behind the irritation. “You’re ruthless, professor.”

“Not a professor,” you mutter again, gathering your things. “And I’m serious about the deadline. If you want to pass, you need to put in the effort.”

She sighs dramatically, but there’s a playful edge to it. “Fine. You win. Three days.”

“Good. We can end it here. Use your free time to start your research.” You stand, slinging your bag over your shoulder. “I’ll see you at the next session.”

“Can’t wait,” she says, her smile lingering as you walk to the door.

—

The apartment feels like a safe haven when you finally stumble inside, just tipsy enough to make your head feel light but not so much that you’re completely out of it. The air smells faintly of leftover takeout and stale coffee, the way it always does after a long week. Your shoes hit the floor near the door, and you don’t bother picking them up. Instead, you head straight for the couch, collapsing with a heavy sigh.

You needed that night out—needed the drinks, the music, the laughter with friends. It wasn’t anything wild; just a low-key bar near campus, a few rounds of beer, and some half-baked attempts at catching up with everyone’s lives. But it was still more social interaction than you’d had in weeks. Between your own academic deadlines and the increasingly complicated ordeal of tutoring Yunjin, you’d been feeling stretched thin.

Yunjin. Of course, she slips into your thoughts now, the alcohol softening the usual mental barriers you keep firmly in place. She’s been a handful—distracting, playful, unpredictable. And yet, despite every attempt to keep things professional, you can’t stop thinking about her.

Reaching for your phone, you unlock it almost without realizing, falling into the familiar trap of social media scrolling. You tell yourself you’re just unwinding, but before long, you’re typing her name into the TikTok search bar.

Her profile lights up the screen, her most recent video already autoplaying. It’s her dancing again, this time in a sleek black dress that hugs her figure in all the right places. She moves effortlessly to the beat, her smile teasing, her gaze aimed directly at the camera. She looks… stunning.

You swipe to the next video, then the next, each one somehow more captivating than the last. It’s like she knows exactly how to grab attention, how to hold it. Your head feels warm, your thoughts fuzzy as you watch her, your focus narrowing down to just her.

When you finally snap out of it, guilt crashes over you like a wave. What the hell are you doing? You close the app, shaking your head, but the image of her lingers, burned into your mind.

Maybe something else will clear your head. You open Instagram, her profile is the first suggestion, she's posted new stories, but you don't dare watch them. You refuse to give her the satisfaction of knowing you're checking up on her. So, you settle for mindlessly scrolling through her feed, trying not to linger on any one post for too long, until you remember Twitter—X, as you don't like to call it.

The one platform you still use regularly. You tell yourself it’s just to check the news or see what your friends are up to, but before you know it, you’re scrolling through Yunjin’s tweets.

“Some guys are so oblivious it’s cute 🙄💖”

Your heart skips a beat. You scroll down, only to find more.

“It’s kind of cute, though. Watching him pretend he’s not into me. Playing hard to get? Or just clueless?”

Another tweet.

“Bet he’s thinking about me right now. ;)”

You swallow hard, your thumb hovering over the screen. Is she… talking about you? No, that’s ridiculous. She’s a student. You’re her TA. But the way she’s been acting—the teasing, the flirting, the way she always seems to have you off-balance—it’s hard not to wonder. Still, you tell yourself it’s just a coincidence. There’s no way she’s—

And then it happens. Your thumb slips, tapping the heart icon before you even realize what you’ve done.

“Shit,” you mutter, staring at the bright red heart like it’s mocking you. Your pulse spikes as you fumble to undo it, the screen blurring for a second as you scramble to fix your mistake. You tap the heart again, the red disappearing, but the damage is done. But has she already seen it? Does Twitter even notify people that fast? Your heart is pounding, your brain racing through worst-case scenarios.

You toss your phone onto the couch, running a hand through your hair. Maybe she didn’t notice. Maybe she’s busy. Maybe, for once, luck will be on your side.

But as you sit there, the room spinning slightly, the thought nags at you. What if she knows? What if this is exactly the kind of confirmation she’s been waiting for?

The alcohol isn’t helping. It’s making everything feel bigger, heavier, more immediate. You grab your phone again, staring at the screen like it might offer you answers. But there’s nothing. No notifications, no messages.

You drop your head into your hands, groaning softly. You’re not helping yourself in this situation.

—

The door feels heavier than usual as you push it open, the familiar office waiting for you inside. You’re gripping your bag tightly, trying to shake off the nerves that have been building since last night. The tweets, the like, the un-like—it’s been on your mind nonstop. But you keep telling yourself she didn’t notice. She couldn’t have.

The air is warmer today, and as usual, Yunjin is already seated, legs crossed, phone in hand. She’s wearing a fitted blouse with the top buttons undone and a pleated skirt that rides high on her thighs, her usual flair for turning any setting into her personal stage.

“Good afternoon,” you say, your voice coming out strained despite your best effort to sound composed.

“Hey, professor,” she greets, glancing up with a lazy smile before setting her phone down. “Oh, wait. Not a professor. Just my very dedicated teaching assistant.”

You ignore the tease, sitting at your usual spot across the table. “I assume you’ve brought the research I asked for?”

Her expression shifts, and she gives you a sheepish smile, leaning back in her chair. “About that…”

“Yunjin. Don’t tell me—”

“I didn’t finish it,” she says quickly, holding up her hands as if to ward off your reaction. “The deadline was so short! And I had other stuff going on. It’s not like I didn’t try—I just couldn’t get it done in time.”

You lean back in your chair, pinching the bridge of your nose. “You promised to take this seriously.”

“I am taking it seriously,” she insists, though her tone is more casual than apologetic. “It’s just… you didn’t give me much time.”

“That’s because this is supposed to be a priority,” you snap, unable to hide your frustration.

She pouts slightly, leaning forward. “Look, I’ll finish it. I’ll email it to you later tonight. Then we can talk about it during the next session. Deal?”

You exhale sharply, clearly irritated, but you nod. “Fine. But only because I don’t want to waste today.”

“Thanks, professor,” she says, her smile returning, bright and unbothered.

You pull out her last exam, sliding it across the table. “Let’s go over this instead. Your answers weren’t terrible, but they were surface-level. You’re missing depth, and that’s going to hurt you in the final.”

She groans softly but leans forward, propping her chin on her hand. “Okay, fine. Teach me.”

As you begin reviewing her answers, pointing out areas for improvement, she suddenly interrupts. “Can you sit next to me? It’s easier to see the paper that way.”

You hesitate for a moment before moving to the chair beside her, trying not to overthink it. She scoots closer, and you force yourself to focus on the exam in front of you, walking her through the corrections.

To your surprise, she’s paying attention for once, asking questions and even jotting down notes. But every so often, you catch her looking at you, her lips curving into a small smile when your eyes meet. It’s distracting—too distracting.

“Are you even listening?” you ask, your tone sharper than intended.

“Of course,” she replies, her smile widening. “I just like how serious you look when you’re explaining stuff. It’s cute.”

You ignore the comment, pushing through the rest of the review until, finally, the session is over. Relief washes over you as you start packing up, eager to put distance between you and the lingering tension in the room.

“Well, I’ll see you next time,” you say, standing and slinging your bag over your shoulder.

But just as you’re about to leave, Yunjin speaks up. “Oh, by the way…”

You pause, turning back to her. “What?”

Her smile turns sly, her gaze locking onto yours. “I know you’ve been stalking me.”

Your heart skips a beat, panic rising in your chest. “What are you talking about?”

She leans back in her chair, crossing her legs casually. “Twitter, professor. You liked my tweet last night. Even if you un-liked it right after, I still got the notification.”

Your face flushes hot, and you stammer out a denial. “That was—it was an accident. I wasn’t stalking you.”

“Mm-hmm,” she hums, clearly amused. “Sure, it was an accident. But you’ve been watching my TikToks too, haven’t you? Don’t worry, I don’t mind. I mean, you must like what you see, right?”

“Yunjin,” you say sharply, trying to regain control of the situation. “This is inappropriate.”

“Inappropriate?” she echoes, feigning innocence. “You’re the one watching my videos. I’m just offering to help.”

She leans forward slightly, her voice dropping to a playful murmur. “There are some pictures I can’t post online, but if you’re interested, I could send them to you directly. Just say the word.”

Your throat feels tight, your heart pounding in your ears. “Enough,” you say, your voice firm despite your growing discomfort. “This conversation is over. Focus on finishing your research, and I’ll see you at the next session.”

Before she can respond, you turn and leave, the door clicking shut behind you. Your pulse is racing as you walk down the hallway, the weight of her words pressing heavily on your chest. Whatever game Yunjin is playing, you need to figure out how to stop her, because she's winning. And she knows it.

—

The meeting room is stuffy, filled with the low hum of conversation as teachers and teaching assistants shuffle through papers, laptops glowing on the table. Discussions blur together—deadlines, assignment structures, grading systems. It’s a routine part of the job, but today, the monotony feels heavier than usual. You’ve barely slept, and the endless logistics are starting to drag you down.

Your phone buzzes in your pocket, a tiny lifeline in the sea of boredom. Pulling it out discreetly, you glance at the screen. The message is from Yunjin, which immediately gets your attention. Maybe she’s finally sent the research.

You unlock the screen, expecting a quick note about emailing the document. Instead, you freeze.

The photo stares back at you, and for a moment, your brain short-circuits. Yunjin is lying on a bed, her body draped in sheer lingerie that leaves almost nothing to the imagination. Her lips are pouty, glossy, her eyes half-lidded as she gazes directly into the camera. The curve of her hips, the delicate lace barely covering her small breasts—you almost drop your phone on the floor.

Your stomach twists in a mix of shock and something far more raw.

You glance up quickly, scanning the room. No one’s looking at you—everyone’s absorbed in their own work. But the heat rising in your face makes you paranoid. You tilt your phone slightly, shielding the screen from view, and scroll down, hoping for clarification.

Another photo.

This time, the angle is wider, showing her sprawled on her bed with a laptop propped up in front of her. The message accompanying it reads:

Finishing my research. Thought you’d want proof I’m working hard 😉

The sheer lingerie is even more revealing in this shot, the delicate fabric hugging her curves, the way her breasts press against the lace, the faint outline of her nipples—it’s too much. Your dick stirs in your pants, completely out of your control, and you have to shift in your seat to keep yourself from reacting further.

You type back quickly, keeping your tone as neutral as possible.

You didn’t need to send pictures. Just the research would’ve been fine.

Her reply is almost instant.

But I wanted to show you I’m putting in the effort. Don’t you think I deserve a little reward?

Your pulse spikes, and you grip your phone tighter. What the hell is she doing? You take a slow breath, forcing yourself to focus.

Your reward will be getting an A on the exam. That’s the goal, right?

Her response is teasing, playful.

Oh, I’ve got another exam I want an A on. And I know I can ace it.

Your jaw clenches, and you shift uncomfortably in your seat, trying to keep your expression neutral as you glance around the room again. No one seems to notice your distraction, but the heat creeping up your neck makes you feel exposed.

You type back, your fingers moving quickly.

Just focus on finishing the research. That’s all that matters right now.

She doesn’t back down.

Fine, but don’t forget about my reward, professor. I worked really hard on this, you know.

Before you can think it through, your fingers type a reply that surprises even you.

I’ll think about it later.

Her next message comes with a string of emojis—a cheer, a wink, a heart. Then:

Yay! You’re the best 🥰. Don’t stress too much, okay?

You set your phone down, turning it face-down on the table like that might somehow erase the conversation from existence. But the damage is done. Your heart is pounding, your mind racing, and the tension in your body is impossible to ignore.

What the hell are you doing? You’re losing control of the situation—of yourself—and Yunjin knows it. She’s toying with you, testing your boundaries, and the worst part is, you can’t seem to stop her.

—

The air feels charged the moment you step into the office. Yunjin’s sitting there, but there’s something different about her today—her confidence is practically radiating off her. She’s wearing a strapless crop top that clings to her figure, showing her toned stomach, and a skirt so short it rides high on her thighs when she crosses her legs. Her hair is styled to perfection, glossy and smooth, and her lips are painted a shade of red that’s just subtle enough to feel dangerous.

You swallow hard, trying to keep your composure. The memory of her last text conversation is still fresh, and you can feel the weight of it pressing down on you. But this is supposed to be a professional setting. You remind yourself of that as you set your bag down on the table and pull out her research paper that you printed.

“Well,” you begin, keeping your tone steady. “I have to say, I’m impressed. You really outdid yourself with this.”

Her smile widens, and she leans forward slightly in her chair. “You really think so?”

“I do,” you admit, holding up the paper. “You dug into the material, analyzed it well. It’s thorough. If you put this much effort into your exam, you’ll have no problem passing.”

She stands then, smooth and deliberate, and your chest tightens as she closes the distance between you. “When I thought about how proud you’d be,” she says, her voice soft and teasing, “I couldn’t help but try a little harder.”

You lean against the table, trying to create some distance, but it doesn’t help. She’s right there, standing just close enough for you to catch the faint scent of her perfume.

“This is our last session before the exam,” you say, your voice tight. “Let’s focus on going over your research. We’ll review the points you brought—”

Before you can finish, she reaches out and snatches the paper from your hand. Her eyes gleam with mischief as she steps even closer, tilting her head to look up at you.

“What about my reward?” she asks, her voice dropping into a lower, sultrier tone.

Your blood heats instantly, your pulse pounding in your ears. You take a sharp breath, trying to push the rising tide of desire back down. “Yunjin,” you say, your tone edged with warning. “We don’t have time for this. Your exam is right around the corner—”

“Forget about the damn exam,” she interrupts, her voice firm but still teasing. “I don’t care about that right now.”

Her finger presses lightly against your chest, trailing downward over your shirt. The touch is electric, sending sparks down your spine, and for a moment, you can’t move.

“Yunjin,” you whisper, her name catching in your throat.

She steps closer, her body brushing yours, her lips curving into that maddening smile. “Stop pretending you’re not into me,” she murmurs.

“This is unethical,” you say, your voice strained, but even you can hear the weakness in it.

“No one has to know,” she counters, her finger still moving slowly down your chest. Her voice drops again, turning into a near whisper. “What did you do with the pictures I sent you? Hm?”

You freeze, your breath catching.

“I bet you jerked off to them,” she continues, her words deliberate and slow. “I bet you imagined me on that bed, in that lingerie. I bet you imagined fucking me.”

It’s too much. The tension, the temptation, the way she’s looking at you with those half-lidded eyes—it all boils over. Before you can stop yourself, you grab her, your hands gripping her waist as you kiss her hard.

She gasps softly against your mouth, her body tensing in surprise, but she recovers quickly, her hands sliding up to your shoulders as she kisses you back with just as much heat. Her lips are soft and plush, tasting faintly of gloss, and the way she moves against you is intoxicating.

Your hands move instinctively, one sliding up her back while the other presses against her hip. Her skin is warm beneath the thin fabric of her top, and the closeness of her body only stokes the fire burning inside you.

Without breaking the kiss, you guide her toward the door, fumbling with the lock until you hear the satisfying click. It’s only then that you let yourself acknowledge what’s happening, fully giving in to the need that’s been building for weeks.

She pulls back slightly, her breath coming in quick gasps as she looks up at you, her eyes wide and dark with desire.

“This what you wanted?” you ask, your voice rough, your hands still holding her tightly.

She smiles, slow and wicked. “Yes,” she whispers.

Your grip tightens on her waist, and you push her back against the wall, your lips finding hers again with even more urgency. Her hands slide up into your hair, tugging lightly, and the sensation sends a shiver down your spine.

This girl—she’s like nothing you’ve ever experienced. You’ve never wanted someone this badly, never felt this out of control. And for once, you don’t care.

Your hands fumble with the belt at your waist, the leather slipping through the loops as you tug it free with an urgency that borders on desperation. The metal buckle clinks loudly in the otherwise silent room, and Yunjin smiles, leaning back against the wall, looking so damn pleased with herself. Her lips are parted, her chest rising and falling in anticipation, and that smug expression on her face only makes the heat inside you burn hotter.

“You have no idea how much you’ve been driving me fucking crazy,” you growl, your voice low and rough, barely able to contain the frustration and desire that have been building for what feels like forever.

Her smile turns into a wicked grin, her eyes gleaming with triumph. “Then show me,” she whispers, her voice soft but daring. “Show me how crazy I’ve made you.”

You shove your pants down, along with your boxers, kicking them off with your shoes in one quick motion. Your cock springs free, hard and aching, the weight of it hanging heavy between your legs. The cool air against your skin only heightens the tension crackling in the room.

Yunjin’s eyes drop immediately, her tongue flicking over her lips as she takes you in, and for once, she doesn’t say a word. She doesn’t have to. The look on her face says it all.

Your hands move to her hips, and you yank her skirt up roughly, the fabric bunching around her waist. That’s when you see it—she’s not wearing any panties. Nothing at all. The curve of her bare ass, the glistening heat between her thighs, it’s all there, shamelessly on display.

“You little whore,” you hiss, your fingers digging into her soft flesh.

“Yes,” she breathes, arching her back and pressing her ass against you. “I am. I’ve been waiting for you to finally notice.”

“Well, you’ve got my attention now,” you snap, your voice heavy with a mix of irritation and raw lust.

Without another word, you drop to your knees, grabbing her hips to steady her as you position yourself behind her. Her ass is sticking out, her body pressed against the wall, her legs slightly parted. The sight of her like this, so willing, so ready—it’s almost too much.

You spread her cheeks, exposing her fully to you, and you’re met with the sight of her pussy, already slick and glistening, her arousal shining in the dim light of the room. The smell of her hits you instantly—sweet and musky, intoxicating.

Leaning in, you drag your tongue over her folds, slow and deliberate, tasting her for the first time. She gasps, her body jerking slightly at the contact, and her hands press against the wall for support.

“Fuck,” she moans, her voice high and needy. “More.”

You don’t hesitate. You bury your face between her thighs, your tongue sliding through her wetness, exploring every inch of her. You flick your tongue over her clit, and she lets out a loud, breathy moan, her hips grinding back against your face.

Her taste is addictive, her slick heat coating your lips and tongue as you work her over. You grip her thighs, spreading her wider, giving yourself more access as you suck her clit into your mouth, rolling your tongue over the sensitive nub.

“Shit, that feels so good,” she whimpers, her voice breathless. “Don’t stop. Please, don’t stop.”

You hum against her, the vibration making her gasp again, and you dive back in, fucking her with your tongue before moving back to her clit. She’s dripping now, her juices slicking your chin, but you don’t care. All you can think about is how good she tastes, how perfect she feels under your tongue.

Her moans grow louder, more desperate, her fingers curling against the wall as she pushes her hips back, practically riding your face. “Yes, fuck, just like that,” she cries, her voice breaking. “More. I need more.”

And you give it to her. Your fingers dig into Yunjin’s soft, perfect ass, the same one you’ve seen flaunted all over Instagram and TikTok—dancing, teasing, making you want something you shouldn't. But now it's here, in your hands, trembling under your touch as your tongue drags through her soaked folds again. She's moaning, gasping, her body pressing harder into the wall, and you can feel the way she’s falling apart, unraveling under your mouth.

“Oh fuck, professor,” she gasps, her voice dripping with something between amusement and desperation. You know she’s doing it on purpose—calling you that even though you’re just the teaching assistant, pushing buttons, seeing how far she can take it now that you’ve finally snapped.

You don’t care anymore.

Your grip tightens, fingers sinking into her flesh possessively, your tongue working faster, harder. Yunjin’s hips jerk, her thighs quivering, and she whines, that high-pitched, needy sound that makes your cock throb painfully with desire. Her juices are all over your mouth, dripping down your chin, and you don’t stop, don’t let up, because you need her to know she’s not in control anymore.

“I knew you'd be good at this,” she breathes, pushing her hips back into your face, rocking against you shamelessly. “All that self-control... gone.”

You groan into her, the vibrations making her moan louder, her fingers clawing at the wall for support. She's a mess, squirming, panting, but you pull back suddenly.

She gasps, looking over her shoulder with a half-lidded, fucked-out expression. “W-why’d you stop?”

You wipe your mouth with the back of your hand, your lips glistening with her slick, your chest rising and falling with heavy breaths. “Because I need more.”

Before she can say anything, you're standing up, pressing your body against hers, the heat of her skin making everything more real, more alive. Your hands grab her hips roughly, and you feel her shiver when your cock, hard and aching, presses against the dripping heat between her thighs.

She lets out a sharp gasp when you slide the tip in, her pussy so tight, squeezing you instantly, and yet so slick from your mouth that you slide deeper without resistance. Her hands slam against the wall, her mouth falling open in shock. “Oh, fuck, you—you're so—”

You don’t let her finish. You grip her waist and thrust in deeper, stretching her inch by inch, and she melts against you, her breathy moans echoing in the small office. Her tight heat wraps around you perfectly, and it’s fucking perfect, the way she clenches down, her body welcoming you with every movement.

“You didn’t think I’d actually fuck you like this, did you?” you murmur against her ear, your voice rough, dark.

She whimpers, pushing back against you, her nails scratching the wall. “I hoped,” she gasps, her voice breaking when you thrust harder, slamming her hips against the wall. “I wanted you to, so fucking bad—”

Your grip on her tightens, your hands roaming over her body, gripping her hips, her waist, her ass—claiming her, branding her. She’s yours now, and she knows it.

“Then take it,” you growl, pounding into her harder, your hips slamming against hers. Yunjin cries out, her body arching, her head falling back against your shoulder as she surrenders completely.

She's giving herself to you, and you take everything.

Your hips snap forward, slamming into Yunjin’s tight, slick pussy with a rhythm that grows rougher, harder, more desperate by the second. Her moans are high and breathless, rising with each thrust.

But it’s not enough.

Your hands slide up her body, greedy and possessive, until they reach her small, almost-flat chest. The crop top she’s wearing clings to her like a second skin, and it’s been driving you insane since you entered the room. She had to do this—she had to tease you, prance around in those tiny fucking tops like she didn’t know exactly what she was doing.

Gripping the hem, you yank it down roughly, baring her breasts in one swift motion. They’re small, just barely enough to fill your hands, but perfect. Perfect in a way that makes your head spin. Her nipples are already hard, tight little buds that beg for your attention, and you don’t hold back.

“God, I’ve been imagining this,” you growl, cupping her tits, rolling her nipples between your fingers. The soft gasp that leaves her lips only spurs you on, your voice dark and raw. “Ever since the first day I saw you in one of these slutty little tops. I wanted to do this. I wanted to see these tits—these fucking perfect tits you love to show off.”

Yunjin cries out, arching her back, pushing her chest into your hands. “Fuck,” she gasps, her voice trembling with pleasure. “I knew you wanted me, professor. I could feel it. And now you’ve got me. You’ve got me so fucking wet.”

Your cock twitches inside her at her words, and you thrust harder, making her yelp, her thighs shaking against you. “You’re the kind of girl who drives me insane,” you admit, your hands still kneading her breasts, tugging her nipples, making her moan louder.

“Yeah?” she pants, turning her head to look at you over her shoulder, her eyes dark with lust. “Am I your type? Is that it? You like slutty girls like me?”

You groan, your hands sliding down to her waist, gripping her tightly as you fuck her harder. “Yes,” you growl through clenched teeth. “That’s the fucking problem. Girls like you—slutty little teases who know exactly what they’re doing—drive me out of my goddamn mind.”

She lets out a choked laugh, her head dropping forward as you hammer into her, her body jolting against the wall. “Then go crazy,” she whispers, her voice dripping with challenge.

Something in you snaps. You pull out suddenly, ignoring her whimper of protest, and grab her roughly by the hips. Turning her around, you lift her onto the table in one swift motion, throwing her onto her back with no hesitation. Her skirt is still bunched around her waist, and her crop top is shoved down, her bare tits on full display as she sprawls out in front of you.

You lean over her, grabbing one of her breasts and taking the nipple into your mouth, sucking hard. Yunjin cries out, her back arching off the table, her hands flying to your hair as she holds you there.

“Oh my god,” she moans, her voice shaking. “Yes, yes, suck them. Fuck, that feels so good—”

You switch to the other nipple, your tongue flicking over the hardened peak before you suck it into your mouth, drawing another loud, breathless moan from her. She’s squirming under you, her thighs spreading wider as her hands tug at your hair, desperate for more.

When you finally pull back, her chest is heaving, her skin flushed, her lips parted in a way that makes your cock throb. You grip her hips, dragging her to the edge of the table, and position yourself between her legs.

The sight of her like this—her skirt pushed up, her top pulled down, her bare tits rising and falling with every shaky breath—is enough to make you lose what little control you have left. She looks like a slutty schoolgirl, and you can’t stop yourself from imagining her like that, teasing every teacher she’s ever had until she found one who finally gave in.

“You look like such a fucking slut,” you growl, lining yourself up and slamming into her in one hard thrust.

Yunjin cries out, her head falling back against the table, her hands flying to your arms as you grip her hips and start fucking her again. “I am,” she whimpers, her voice high and desperate. “I’m your slut.”

And that’s all you need to hear.

Your hips move like they have a mind of their own, pounding into Yunjin’s tight, soaking pussy with a relentless rhythm that leaves no space for hesitation. The way she moans—high, breathless, desperate—fuels you, makes you fuck her harder, deeper, chasing that feeling of being completely lost in her.

She’s gripping the edges of the table, her knuckles white, her chest rising and falling rapidly. Her eyes are hazy, lips parted, and the way pleasure takes over her face is fucking intoxicating.

“F-fuck,” she gasps, her voice trembling as you keep slamming into her, your cock stretching her perfectly. “If you keep—keep going like this, I’m gonna—”

“That’s the point,” you growl, leaning over her, your hands tightening on her thighs as you thrust even harder. “Cum on my cock, Yunjin. I want to feel it.”

“Fuck, professor,” she moans, rolling her hips up to meet your every thrust, and hearing that word spill from her lips so naturally drives you fucking crazy. She loves calling you that, loves the way it sounds when she’s this desperate and fucked out.

Your thumb finds her clit, still sensitive from the way your mouth had worked her over earlier, and the second you press down, she nearly jumps off the table.

“Oh my God,” she whimpers, squirming under you, her body tensing. “Too much—fuck, that’s so—”

But you don’t stop. You rub tight circles over her clit, making her thighs tremble around your waist, and the louder she moans, the harder you fuck her. You forget everything—where you are, what you’re doing. You don’t care that you're in a office, on campus, where anyone could hear. All you care about is making her cum.

“Cum for me,” you demand, your voice rough, your cock throbbing inside her. “Come on, slut. Cum all over my cock.”

“I’m—I’m almost—” Her voice breaks, and her whole body tightens, her pussy clenching down around you so hard it makes your own pleasure spike.

Your thrusts grow even faster, each one hitting so deep it leaves her gasping, and her wetness makes everything filthy, each slap of your hips against her sounding louder, slicker. The obscene noise fills the room, but you’re too far gone to care.

And then she breaks.

Her entire body shudders, her back arching off the table as she covers her mouth with one trembling hand, muffling the scream that threatens to spill out. Her pussy clenches around you, pulsing with each wave of pleasure that rocks through her, and you keep fucking her through it, driving slow, deep thrusts into her shaking body.

Each slow pull out, each hard thrust back in, sends a jolt through her, making her whimper into her palm, her eyes squeezed shut as the aftershocks keep rolling through her.

You finally slow down, your cock still throbbing inside her, soaked in everything she’s given you. You pull out slowly, watching the way her pussy clings to you, reluctant to let go.

“On your knees,” you order, your voice thick and wrecked.

She’s still trembling, but she slides off the table, her legs shaky as she sinks down in front of you, eyes dark with lust, lips swollen from all her moaning. She looks up at you through heavy lashes, her skirt still bunched up, her top still tugged down, her tits out and flushed.

She grabs your cock with both hands, stroking it once, twice, and the sight of her, kneeling, covered in her own arousal, makes you think you should have fucked her sooner.

Then her lips part, and she wraps them around the head of your cock, sucking you in with that perfect, practiced mouth.

“Fuck,” you hiss, your hand tangling in her hair, guiding her as she takes more of you in. Her lips leave smudges of lipstick along your shaft, marking you, staining you with that perfect, slutty red.

She moans around you, her tongue swirling, and you watch as she bobs her head, her mouth stretching to accommodate you. It’s hot—so fucking hot—the way she’s so eager, so desperate to taste herself on your cock.

“Good girl,” you murmur, your grip tightening on her hair as you guide her pace. “Suck it all, baby.”

Yunjin hums in response, the vibrations making you groan, and you know you’re not going to last much longer.

Yunjin’s mouth is a fucking masterpiece. Her plump, wet lips glide over your cock with a skill that has you gripping the edge of the table for support. Drool drips down her chin, slick and messy, pooling at the corners of her mouth as she takes you deeper, her throat flexing around your length. The obscene, wet sounds echo in the quiet room, each suck, each moan sending shockwaves straight to your core.

She’s a mess, lipstick smeared, saliva glistening on her chin and trailing down her neck, but she doesn’t stop. If anything, she gets sloppier, filthier, letting spit dribble down your shaft as she strokes you with both hands, twisting, squeezing, making sure you're soaked in her mess.

“Fuck, Yunjin,” you groan, your hand tangled in her hair, guiding her movements. “Just like that. Keep going.”

She hums around you, the vibration making your thighs tense. Then, without warning, she moves lower, dragging her slick tongue down to your balls, sucking one into her mouth while still jerking your cock. The way her tongue swirls around them, wet and warm, sends you reeling, your cock twitching in her grip.

Your head falls back, a low, guttural groan slipping past your lips. She knows exactly what she’s doing, taking her time, teasing, drawing it out until you’re on the verge of losing control.

Then she’s back on your cock, focusing on the sensitive head, sucking hard, her tongue flicking over the slit, drawing out beads of pre-cum. Wet, obscene noises fill the air, her lips working you with relentless precision.

“I’m close,” you grit out, your muscles tensing, your whole body tightening in anticipation.

But just when you think you’re about to explode, she pulls off with a pop, wiping her mouth with the back of her hand, her lipstick smeared across her flushed skin, drool glistening on her chin. She looks up at you, eyes dark and needy, lips swollen and shining.

“Cum inside me,” she says, her voice dripping with sin. “I want it. I’m on the pill, so don’t hold back.”

That's all you need to hear. No hesitation. No second thoughts. You’re on her in an instant, hauling her up off her knees, your hands gripping her thighs as you carry her to the chair in the corner of the room. You drop into it, pulling her onto your lap, her legs straddling you.

She doesn’t waste a second. She reaches between you, grabbing your slick, throbbing cock and guiding it back inside her dripping pussy. The heat, the tightness, the way she sinks down onto you in one smooth motion makes your head spin.

“Fuck,” you hiss, your hands gripping her hips, feeling the way she clenches around you, wetter than before thanks to the sloppy blowjob she just gave you.

Yunjin smirks, rolling her hips in slow, deliberate circles, grinding down on you in a way that has you seeing stars. “Feel good, professor?” she purrs, her hands resting on your shoulders for balance. “You like when your little slut rides you?”

You groan, your grip tightening, but she doesn’t let up. She starts moving, bouncing on your cock with an intoxicating rhythm, her tight pussy swallowing you over and over. The way her hips roll, the way she grinds down between thrusts—it’s hypnotic, like she was made for this. Like she’s done this a million times before.

“Fuck, you know exactly what you’re doing,” you pant, your head falling back against the chair.

“Of course I do,” she whispers, leaning in close, her lips brushing against your ear. “I know how to fuck. I know how to make you cum.”

Your whole body tightens, the pressure building to a breaking point as Yunjin rides you with that perfect, relentless rhythm. Her hips roll in slow, deep circles, grinding down on your cock like she owns it, like she knows exactly what you need. The wet, obscene sounds of your bodies colliding fill the room, her slick pussy squeezing you with every bounce, pulling you deeper, tighter.

She leans in, her breath hot against your ear, her voice a low, breathy whisper. “You’re gonna cum, aren’t you?”

Your grip on her hips tightens, fingers digging into her soft skin, trying to hold on as pleasure coils tighter and tighter inside you. “Fuck, Yunjin,” you groan, your voice rough and strained, barely holding it together.

She bites her lip, looking down at you with dark, knowing eyes. “I can feel it,” she purrs, rocking her hips down hard, her wet heat swallowing you to the hilt. “You’re so fucking close.”

You nod, chest heaving, your breath ragged. “Yeah—shit, I’m—”

“Cum inside me,” she interrupts, grinding her hips down with a sinful twist that sends sparks shooting through your spine. “I want it, professor. Fill me up.”

Her words make you moan, tearing down whatever restraint you had left. Your cock throbs inside her, and you feel yourself teetering right on the edge, so close you can’t even think straight.

“Creampie this tight little pussy,” she whispers, her lips brushing against your ear, her voice dripping with need. “I want to feel your hot, thick cum deep inside me. Come on professor, give me my reward.”

That’s it. That’s all it takes.

A strangled groan rips from your throat as you finally let go, your cock pulsing inside her, thick, hot spurts of cum spilling deep into her. Your whole body shudders, muscles going tight, and you bury your face against her neck, holding onto her like she’s the only thing keeping you grounded.

Yunjin gasps, feeling every pulse, every drop of warmth filling her. Her body trembles against yours, her nails raking lightly down your back as she moans into your ear, soft and breathless. “Oh my god,” she whimpers, her hips still moving, riding out your release, grinding slow and deep to milk every last drop from you.

You grip her tighter, pushing her down onto you as deep as she can go, wanting to make sure she takes every bit of it. “Fuck, Yunjin,” you pant, feeling the way her pussy clenches around you, still so impossibly tight. “You feel so fucking good.”

She moans in response, rolling her hips lazily, a satisfied, dazed smile spreading across her lips. “Mmm, I can feel it,” she whispers, her hands sliding up your chest, her fingers tracing over your skin. “You came so much.”

You groan, your hands slipping to her ass, gripping her firmly as you thrust up into her one last time, pushing your cum deeper inside. She lets out a sharp gasp, her head falling forward against your shoulder.

A few long moments pass before she finally stills, collapsing against you, her chest heaving, her skin slick with sweat. Your hands stay on her hips, holding her in place, keeping yourself buried inside her even as your cock twitches with oversensitivity. You can feel the warmth between her legs, the way your cum is starting to trickle out, leaking down onto your thighs, but she doesn’t move—doesn’t seem to care.

You don’t say anything for a moment, just holding her, feeling her heartbeat against yours. But then she lifts her head, that familiar, wicked grin spreading across her face.

“Guess I should call you professor more often,” she whispers, rolling her hips lazily.

You groan, your head falling back against the chair. “I can't believe I fucked a student.”

Yunjin laughs, pressing a soft, teasing kiss to your lips. “And you loved every second of it."

She stays perched on your, her bare thighs pressed against yours, her pussy still warm and slick around your softening cock. The lazy rise and fall of her chest, the way her messy hair frames her flushed face—it’s all so goddamn perfect. She looks at you with that smug little smile that’s both adorable and infuriating, her fingers tracing lazy patterns across your chest.

“So,” she purrs, tilting her head slightly, “what grade do I deserve for all my... hard work?”

You smirk, running your hands up her sides, feeling the heat of her skin beneath your fingertips. “An A,” you admit, your voice still ragged from everything she’s just put you through.

Her smile widens, and she leans in, pressing a slow, teasing kiss to your lips. “I know,” she whispers, cocky as ever. She fucking knows exactly what she’s doing to you, and that little glint in her eyes makes your heart race again.

She shifts slightly, grinding down just enough to remind you that she’s still there, still wrapped around you, and then she lowers her voice. “So... can I get an A on the exam too?”

And just like that, reality comes crashing back.

You freeze, the post-orgasm haze clearing just enough for the weight of what she’s asking to settle in. This was bound to happen, wasn’t it? The teasing, the flirting, the fucking—it was all leading to this. A transactional undercurrent beneath every sultry look, every professor she moaned while you fucked her in the office.

You swallow, your hands hesitating on her waist. “Yunjin,” you start, shaking your head slightly, “I... I can’t do that. I mean, I—”

She cuts you off by pressing a finger against your lips, her eyes locking onto yours, dark and full of something dangerous. “Yes, you can,” she murmurs, leaning in just enough for her lips to brush against your cheek, teasing, distracting. “Because you like me.”

You feel your resolve wavering, your mind screaming at you to push her away, to get up, to say no—but your body? Your body’s already leaning into her, already craving more.

“And,” she continues, trailing her finger down your chest, her voice dripping with sweet, poisonous temptation, “because I know you’ll want to fuck me again. Don’t you?”

Fuck.

She’s right. Of course she’s right.

Your jaw clenches, the internal battle raging inside you—ethics, professionalism, responsibility. But what are those compared to the feel of her? The way she’s looking at you, promising so much more with just a glance? You’ve already crossed a line so thick and deep there’s no point pretending you can step back now.

She senses your hesitation, and like the predator she is, she pounces.

Her lips are back on yours, slow and sensual, tasting like sin and triumph. She rolls her hips against you, and your cock twitches, traitorous and eager. “I’ll make it worth your while,” she whispers, lips brushing against your ear. “You think today was wild? I’ll show you things that’ll ruin you for anyone else.”

Your grip tightens on her hips instinctively, and your mouth moves before your brain can catch up. “What... what kind of things?”

Yunjin grins, leaning back to meet your gaze, her fingers playing with the collar of your shirt. “Oh, professor,” she teases, eyes gleaming, “you’ll just have to say yes to find out.”

You exhale sharply, your moral compass spinning wildly, but the truth is, it’s already broken.

Fuck ethics.

Fuck responsibility.

You want her. You want her more than you care about some stupid fucking exam.

Surrendering, you nod, a shy whisper. “Fine.”

Her eyes light up, and she lets out a delighted little laugh, her arms wrapping around your neck as she rocks her hips against you. “I knew you’d come around,” she purrs, nipping at your bottom lip. “You’re too easy.”

“You’re fucking evil,” you mutter, your hands gripping her ass tightly, fingers digging into the soft flesh.

She just grins. “And you fucking love it.”

You can’t argue. Not when she’s looking at you like that, like she owns you, because fuck—it sure feels like she does.

Yunjin shifts on your lap, moving in a slow, sensual grind that makes your head spin, and you groan, already hardening inside her again. “I guess I always manage to pass,” she murmurs, kissing along your jaw, “but in my own way.”

You shake your head, but there’s no fight left in you, only a deep, gnawing hunger for her. “You’re trouble,” you murmur, hands roaming her body again, already wanting more.

She smirks, pressing a kiss just below your ear. “I’m your trouble now.”

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