pairing: sunghoon x reader description: shy professor sunghoon with college student (he's only few years older) contains smut 18+
he wasn’t used to attention. he liked keeping his head down, blending in, quietly doing his job.
until you walked into his classroom.
you weren’t even late - you arrived perfectly on time but he still froze mid-sentence when he saw you. it wasn’t dramatic, just a tiny pause, a flicker of surprise behind his glasses. you smiled politely and took your seat, but sunghoon had already lost his train of thought.
for the next few weeks, sunghoon was a mystery.
he wasn’t cold, just shy. when he handed back assignments, he’d slide them onto your desk a little too quickly.
when he answered your questions after class, he’d push up his glasses and avoid eye contact for the first few seconds, his voice quiet but gentle.
one evening, after a long lab session, you noticed he was packing up slowly, stealing glances your way as if he wanted to say something but couldn’t quite find the courage.
'sir,' you said softly
he nearly dropped the stack of papers in his hands. 'y-yes?'
'are you okay?'
he nodded too fast, 'yeah- yes. i mean… i was wondering…' his voice got smaller. 'did you… need help with anything?'
you smiled. 'actually, i stayed to ask you about something.'
his eyes flicked up, nervous and curious all at once. 'oh- of course. what did you want to ask?”
you hesitated - not because you didn’t know, but because he looked so anxious that you didn’t want to overwhelm him. you set your bag down and leaned lightly against the desk.
'it’s about the experiment from last week,' you say. ' i think i messed up the calculations. i didn’t want to email it. i kind of wanted to hear it from you.'
sunghoon blinks, then relaxes just a little. talking about physics was familiar territory. safe.
'ah. i can help,' he said, and his voice steadied. 'do you want to sit? we can go through it together.”
you both moved to one of the front lab tables. he sat a respectful distance away, hands folded too neatly in his lap as if he was afraid of taking up space.
when you opened your notebook, he leaned in to look - but stopped halfway, realizing how close he’d be. his cheeks flushed and he adjusted his glasses instead.
'you can look,” you say, smiling. 'i don’t mind.'
he swallowed softly. 'r-right. sorry.'
but he leaned in this time, slowly, like he was testing gravity itself.
as he explained the formula, pointing at your handwriting with a soft, careful gesture, his shoulder brushed yours - just barely. you felt him stiffen instantly.
'sorry-'
'it’s okay,' you whisper.
sunghoon’s breath hitched and he focused intensely on the equation, as if the numbers could save him from the warmth spreading across his face.
'you actually did everything right,' he says after a moment. 'your reasoning is solid. you just… don’t trust yourself. '
he closes your notebook gently, his fingers lingering on the cover for a second before he realizes and pulls his hand back.
he clears his throat, trying to steady himself, though the tips of his ears are already turning pink.
'so… um… what else did you want to ask?' he asks.
you can tell he’s trying to sound casual, but his voice gives him away - nervous. like he knows the question you stayed behind for isn’t really about physics.
you tap your pen against the table, considering your words. his eyes follow the movement, then flick back up to your face before looking away.
‘well…’ you begin, leaning in a bit closer, ‘this one isn’t exactly about class.’
sunghoon visibly tenses - not in fear, just in that shy startled way he always reacts around you. he straightens his posture, fidgets with his glasses, then drops his hands in his lap because he doesn’t know what to do with them.
he swallows, ‘oh, um that’s okay. you can… ask anything.’
you smile, teasing lightly, ‘are you sure? anything?’
‘well- within reason. i mean yes. i’m listening.’
you take a breath, watching him. he seems so nervous, like he’s bracing for something he can’t predict.
“it’s just…’ you say, letting your voice drop a little, ‘i’ve noticed you get flustered around me. more than you do with other students.’
his shoulders go rigid, and his breath halts. for a split second, he forgets to blink.
‘i- what?’ he whispers.
you tilt your head, amused by how adorably transparent he is. ‘you do,’ you say gently. ‘your voice gets quiet, avoid eye contact and sometimes…’ you let your fingers rest lightly on the table, close to his. ‘sometimes you blush.’
‘i- don’t i wasn’t, i mean it’s not on purpose.’ he inhales sharply.
‘i didn’t say it was.’ you murmur.
he finally dares to look up at you, eyes soft and unsure.
‘then.. why are you asking.’ he says.
you lean in the slightest bit close enough for him to feel your warmth.
‘i want to know what it means.’ you say, voice low and steady.
sunghoon isn’t breathing. he isn’t moving. he’s just looking at you, as if the floor has vanished beneath him and he’s floating.
waiting for gravity to return.
you make the first move hoping he doesn’t feel uncomfortable, by touching his hand and when you see him relax a bit, you intertwine your fingers.
his eyes don’t leave your face, him hoping he’s not dreaming.
very slowly, you move closer so your shoulders touch and rest your head on his shoulder, trying to take in his scent. like vanilla and coffee. addicting.
his shoulder tenses for a moment when your head settles there just a tiny hitch of surprise - then he melts. you feel it happen. like every part of him has decided, finally, to stop running from whatever this is.
‘you can’t just… do that to me, ‘he whispers, voice barely audible. ‘i am not used to someone being this close.’
you shift just enough for your cheek to brush the side of his neck. his breath stutters, warm against your hair.
'then let me be the exception,' you murmur.
sunghoon closes his eyes for a moment. when he opens them again, something in them is unguarded - fragile and wanting. his free hand lifts hesitantly, hovering over your thigh as if unsure he’s allowed to touch.
after a long second, he lets his fingers rest there, so gently you can feel the tremble in them.
‘is… is this okay?’ he asks, eyes flicking up to yours like he’s afraid of the answer.
you curl your fingers around his to reassure him. 'it’s more than okay.'
he swallows, throat bobbing, and leans the slightest bit closer. his nose brushes your hair - accidental at first, then deliberate as he breathes in softly, like you’re something he’s been trying not to want.
'you’re really going to be the end of me,' he murmurs. 'you look at me like that and my brain just… stops.'
you smile faintly, lifting your chin until your lips hover near the edge of his jaw. the butterfly-light graze of your breath makes him inhale sharply, almost a gasp he tries (and fails) to hide.
'maybe thinking isn’t what you need right now,' you whisper.
his hand on your thigh tightens - not bold or rough just desperate need to keep you close. his other hand slides up, hesitating along your waist before resting there like he’s afraid you might disappear if he touches too firmly.
then his forehead lowers to yours, slow and careful, your breaths mingling.
'if you don’t want this…' he whispers, voice trembling, 'tell me to stop. because if i move any closer, i don’t know if I’ll trust myself to pull back.'
you don’t tell him to stop.
your lips are mere breaths apart, his eyelashes fluttering with nerves, his hands unsure but aching to hold you.
and when you stay exactly where you are, his resolve crumbles in the gentlest way.
he cups your waist a little firmer, guiding you closer, his breath shaky against your lips. when he finally leans in, his kiss is cautious at first, testing, like he’s learning you by touch alone.
but the moment you kiss him back, his breath hitches, and his hand rises to cradle the back of your neck, thumb brushing your skin with a kind of shaky devotion.
when he pulls away just a fraction, he’s breathless.
'i am… trying to be careful,' he murmurs, voice rough with emotion he can’t hide. 'don’t want to rush you.'
you slide your hand up his chest, feeling the rapid beat of his heart beneath your palm.
'sunghoon,' you whisper, 'i don’t want you to rush. i just want you close.'
his eyes darken - not with lust alone, but with a deeper fire, a tension that has been quietly hiding beneath his shyness for week.
he rises slowly, like any sudden movement might break the fragile quiet between you. he doesn’t let go of your hand. his thumb glides over your knuckles in a slow, almost absentminded stroke, as if the simple contact steadies him.
'come with me,' he says, voice quiet but certain in a way you’ve never heard from him.
you let him lead you, out of the lab, down the dim hallway where the night has already settled in. his hand stays on yours the whole walk, warm and trembling slightly, like he still can’t believe you’re actually following him.
when he reaches his office, he hesitates with the key in the lock, glancing back at you as if checking - just to be sure, that you want to be here. you step a little closer in answer.
the door swings open.
you step inside first. the small room is soft in the low light, smelling faintly of paper and the coffee he always forgets to finish. sunghoon lingers just behind you, unsure if he should close the door or if that’s your choice.
so you make it for him.
you wrap your fingers around the handle and gently click the door shut.
the sound is quiet, but the air shifts instantly. its warm, close and charged in the way that happens only when two people who have been circling each other for far too long finally find themselves alone.
sunghoon’s breath catches. he looks at you like he’s not sure if he should speak first or reach for you or simply stand there and try to steady the pounding of his own heart.
'y- you… locked it,' he murmurs, his voice barely above a whisper.
you step closer, soft enough not to startle him, close enough that his breath mingles with yours.
'i wanted privacy,' you say.
his ears turn pink. his fingers flex at his sides like he’s fighting the urge to reach out again.
'only if you’re sure,' he says, timid but hopeful.
your smile lingers, drawing him in like a gentle pull. he steps forward hesitantly, his hand finally lifting to brush against your arm, fingers trembling just a little as they trace the curve of your elbow.
'i am sure,' you whisper back, your voice a soft caress in the quiet room. the air between you thickens, charged with unspoken wants.
sunghoon's eyes flicker down to your lips, then back up, searching your gaze for any sign of doubt. finding none, he closes the distance, his free hand cupping your cheek with a tenderness that makes your heart stutter. his thumb strokes your skin, light and reverent, as if you're something precious he fears breaking.
'i have wanted this,' he admits, his breath warm against your mouth. 'for so long.'
you tilt your head, closing the gap, and press your lips to his in a kiss that's slow and exploratory. he responds instantly, a soft sigh escaping him as his mouth moves against yours, tentative at first, then deepening with a quiet hunger.
his fingers slide into your hair, holding you close without pulling, just anchoring himself to the moment.
the kiss breaks only when you both need air, and he rests his forehead against yours, eyes half-lidded and shining with emotion.
'tell me what you want,' he murmurs, voice husky now, laced with vulnerability. 'i don't want to rush... but i want to make you feel everything.'
your breath hitches against his lips, the tenderness of the moment shifting as desire surges through you. you pull back just enough to meet his wide eyes, your hand sliding down his chest to grip his shirt, tugging him closer.
'i want you to fuck me hard,' you say, the words tumbling out raw and direct, your voice laced with need. 'right now. don't hold back.'
sunghoon's breath stutters, his pupils dilating as shock and heat flood his face. his hands tighten on you - one in your hair, the other dropping to your waist, fingers digging in with sudden urgency. he searches your eyes for a beat, a low groan escaping his throat.
'god, yes,' he rasps, his shyness cracking under the weight of his own want.
you land against the sofa, and sunghoon doesn't hesitate - he leans into you, pushing you down into the cushions with a controlled urgency.
his lips break from yours only to trail hot, open-mouthed kisses down your neck, teeth grazing your skin as his hands roam your sides, bunching up your shirt to expose your stomach.
he pauses there, breathing heavily against you, his fingers trembling slightly as they hook into the waistband of your pants.
but then, something shifts in him. instead of climbing over you, sunghoon sinks to his knees on the floor beside the bed, his wide eyes locking onto yours with raw hunger.
his hands slide up your thighs, parting them gently at first, then with more insistence as he tugs your pants down, exposing your panties. he leans in, nuzzling his face against the damp fabric, inhaling deeply like he's savoring a forbidden scent.
'you're so beautiful,' he murmurs, voice husky and broken, his shyness melting into devotion. his fingers hook into the sides of your panties, pulling them aside slowly, deliberately, before he presses his mouth to your inner thigh, kissing and licking a path upward.
when his tongue finally flattens against your pussy, lapping at your folds with long, worshipful strokes, a shiver runs through you.
he groans into you, the vibration sending sparks up your spine. sunghoon's hands grip your hips, holding you steady as he devours you sucking on your clit with gentle pulls at first, then harder, his tongue delving inside you, tasting every inch.
he's on his knees like he's praying, his body arched forward, cock straining against his pants as he focuses entirely on your pleasure.
he worships you with his mouth, alternating between broad licks that cover your entire slit and pointed flicks against your swollen nub, his breaths coming in ragged pants between each assault.
the intensity builds fast, your body arching off the bed as heat coils tight in your core. you thread your fingers through his hair, pulling him closer, grinding against his face.
'sunghoon,' you gasp, he responds by sucking harder, one hand sliding up to pinch and roll your nipple through your shirt, the dual assault pushing you closer to the edge.
your moans grow louder, raw and desperate, his name spilling from your lips again and again as waves of pleasure crash over you.
he doesn't stop, his tongue thrusting inside you while his thumb circles your clit, drawing out every tremor until you're shaking, coming undone on his mouth with a cry that echoes in the room.
only then does he pull back slightly, lips glistening, eyes dark with need as he looks up at you from his knees. 'tell me what else you want baby,' he whispers, voice thick with desire.
your chest heaves as you catch your breath, body still tingling from the aftershocks of your release.
sunghoon's gaze burns into you from below, his lips shiny with your arousal, a faint flush creeping up his neck despite the boldness in his eyes.
he's still kneeling, hands resting on your thighs, thumbs tracing slow circles that make your skin prickle.
'i want you inside me,' you breathe, voice rough from moaning his name. 'now, sunghoon. fuck me like you mean it.'
his eyes widen for a split second, that shy flicker returning, but it's quickly drowned out by the heat surging through him.
he rises slowly, almost reverently, his fingers fumbling with his belt as he stands between your legs. the clink of metal echoes in the quiet room, followed by the zipper's rasp.
he shoves his pants and boxers down just enough to free his cock - hard, thick and already leaking at the tip, veins pulsing with need.
sunghoon pauses, hand wrapping around his length, stroking once as he watches you with that mix of awe and hunger.
‘are you sure baby?’ he asks, voice low and tentative, even now, like he's afraid this is all a dream he'll wake from.
you nod, reaching for him, your hand joining his on his shaft, guiding him closer. 'yes. don't make me wait.'
he groans at your touch, hips jerking forward involuntarily. he positions himself at your entrance, pushing in slowly at first, inch by inch, his breath hitching as your walls clench around him.
he stretches you perfectly, and you both let out shaky exhales as he shifts closer to you.
for a moment, his forehead rests against yours. his hands brace on either side of you, arms trembling slightly - that shyness peeking through in the way he bites his lip, holding back.
but you don't want gentle. you wrap your legs around his waist, nails digging into his back to pull him deeper. 'harder,' you demand.
that breaks him. he groans, pulling back almost all the way out before he slams back in hard. he sets a punishing rhythm immediately, hips snapping against yours, cock driving deep with every thrust.
the sofa creaks under the assault, your bodies slapping together wetly as he pounds into you.
his shyness dissolves into pure instinct as his mouth finds your neck, sucking marks into your skin while one hand grips your hip, angling you to take him even deeper.
'so good,' he pants against your throat, voice wrecked. 'you feel... fuck, so tight around me.' it was hot to see him like this, just for you.
the pleasure builds again as your pussy flutters around his length. you arch into him, meeting every thrust, your hands clutching his shoulders.
his name becomes a chant, spilling out louder with each brutal drive of his cock, your control shattering once more under the intensity.
he responds to your cries by fucking you harder, his free hand sliding between your bodies to rub your clit in tight circles, the added friction making stars burst behind your eyelids.
sweat slicks your skin where you connect, his breaths coming in harsh grunts as he chases his own release, but he holds on, determined to drag you under first.
your orgasm hits, walls clamping his thick cock as your arms lock around his neck, body shuddering hard.
his orgasm comes seconds later and he collapses onto you, both of you panting, his weight a comforting press as he nuzzles into your shoulder.
after a beat, he lifts his head, eyes soft now, that shy smile tugging at his lips. 'was that... okay?' he murmurs, brushing a strand of hair from your face, still half-hard inside you.
you pull him down for a lazy kiss, tasting yourself on his tongue. 'more than okay. but we're not done yet.'