SINFUL

「smut」

top!kun
bottom!yangyang

[in which a student fell for his best friend's brother, who happens to be his teacher]

yanyang leaned on his palm as he stared out the window in the back of the car. the autumnal scenery wizzed past like a dream, and the hum of the radio from the front created a relaxed aura.

the ravenette subtly glanced up at the rear-view mirror, catching the stunning face of his best friend's brother, the guy he really liked.....or in other words; their teacher.

qian kun was a well-liked man with an eye-catching smile, decent height and a generous and kind personality. there were many, like yanyang, who had fallen for his allure. the young ravenette was just lucky enough (or unfortunate enough in some cases) to be close to him.

everyday that went by led his feelings to grow more and more. it was a sad reality of an unrequited love, but yanyang was strong enough to tough it out. he couldn't betray renjun that way.

"hey, did you remember your science folder?" the second oldest twisted around in the passenger seat to speak to his friend.

"huh? we don't have science today...."

"yangyang!"

"you're so unorganised, yang," kun took his brother's side, chuckling softly as he looked at the teen through the mirror. "do you want me to turn around so you can get it?"

"it's fine," the shortest sighed, returning his gaze to the window, "i'll survive without it."

the halls were packed with busy students, everyone racing about to reach their designated classes on time. yangyang was a little more relaxed about it though, moving down he corridor at his own pace and occasionally glancing into classrooms to see what was up as he passed.

a specific room caught his eye, one that he always wanted to pass. the teen could watch kun write up lesson plans all day, the way he caught his lower lip between his teeth and furrowed his brows with focus.

he was beautiful.

yangyang hadn't realised he had stopped in the middle of the hall to stare until someone came up behind him and nudged his shoulder. the ravenette gasped, almost dropping his books with fright.

"what are you looking at?" renjun giggled, poking his head around the door to see the class and checking if anyone of notable appearance resided within. to his disappointment, only his brother and some random kids were moving about. "you're a space-case, yang. always have your head in the clouds."

what would you do if you liked someone out of your reach? the younger wanted to retort, though hugged his books closer to his chest and shrugged. "daydreaming isn't a crime, renjun. what's wrong with escaping reality for a while?"

"it's one thing having a little dazed moment here and there," the brunette stated, "but all the time is a worry."

yangyang pouted, glancing back into the room at the tall male and longingly shooting heart eyes at his unaware form. not only was he a teacher and the relationship was illegal in the first place, but he was also renjun's brother, making the whole thing worse.

"c'mon," the older urged, gently pushing yangyang away from the room and down the hallways towards their next class. the pair chatted nonchalantly on the way, never having many conversations of importance, though trusting one another with deep secrets all the same.

all except one, of course.

kun laid a few sheets out on his desk to read over as his class took a small test. they all worked away quietly, surprisingly obedient for such a soft teacher. the brunette ran a hand through his hair, taking a look at the first handout on the stack.

it was yangyang's, since he taught the boy music theory. he would've been the first to admit he had a soft spot for both renjun and his brother's best friend, having known yangyang for years now.

to say he was guilty of unlawful emotions wouldn't have been a lie. he was a toned-down, chilled out sort of person.....but stress was a funny thing, and hit people differently.

there was one particular night, that — kun could remember — when yangyang slept over. he must've been fourteen or so, and the older would've been about nineteen. the teen had experienced a 'dream', and panicked in the middle of the night since he was too embarrassed to move in case renjun had woken up.

kun, who slept in the room adjacent and could hear his panicked breathing, ran in to make sure nothing was wrong. thus, finding yangyang beckoning him over with upset eyes.

neither regretted helping each other that night, feeling an intimacy that was new to both. after all, kun was still in college, and the term 'love' wasn't what they would've called it back then. but the spark they felt that night only grew each day, and suddenly the 'little brother - big brother' relationship disappeared. they were left seeing each other as 'men', and what men could do.

yangyang, however, had no idea that kun felt this way, and it was likewise for the older.

the tall male sighed as he picked up his pen and started correcting the pop-quiz, proud that his student had been doing well. he was a good teacher, and everyone knew it. perhaps having a nice face was enough to hold a classroom's attention. who knew?

"sir! i'm finished!" a girl called, shooting her hand in the air to gain attention. kun glanced up at her and smiled at the enthusiasm.

"nice. make sure you've read over it, and then hand it up."

"okay."

i should've taken a different profession, he thought tiredly, flicking to the next sheet, teaching has no room for distraction. and liu yangyang is one hell of a distraction....

the day dragged on an awful lot longer than needed, and everyone was simply ready to go home. yangyang tiredly packed his bag with his books, slinging the strap over his shoulder and slamming the locker shut.

his feet guided the way towards the front doors, freedom so close. yet he was stopped near the exit, the vibrations of his phone in his pocket capturing his interest. the ravenette stood off the to the side, picking it up and holding the device to his ear.

"hello?"

"hey yang! it's me, renjun."

"mmm, i know. what's up?"

"you and kun have to go home without me. the festival committee want me to stay back for a couple of hours to plan for the upcoming dance."

"that sucks. seriously?"

"mmm. it's fine, i don't mind. see you soon."

"okay, i'll tell kun. bye."

"see ya!"

with that the line went dead, leaving the receiver to beep two or three times before yangyang left the call as well. he shoved his phone back into his pocket and resumed his walk towards the doors. the car park was right outside, which was a relief, because the sky started to spit raindrops.

the teen sprinted towards his teacher's car, noticing that the tall man was already inside and sliding into the passenger's seat.

he slammed the door closed behind him, pulling his jacket tighter around his body and shivering. "ugh, autumn weather."

"so unpredictable," kun agreed, smiling warmly and looking back towards the school. "where's renjun?"

"isn't coming. the committee want him for planning, or something...." the ravenette explained, trying not to look at the older for fear of letting his emotions show.

the teacher swallowed harshly, not having been left alone with yangyang in quite a while and suddenly wondering how well he trusted himself not to act out.

he looked so pretty with mildly damp hair and pink cheeks.

"okay, let's get you home," he eventually hummed, pulling out of the campus area and taking off down the road. the beginning of the trip was silent, only their soft breaths and the patter of rain against the windshield breaking the quiet.

neither knew exactly what to say. it was hard, really, when all both wanted to do was come out with it. admit to the illegal feelings they had.

as they neared the estate yangyang lived in, their hearts started to beat harder at the compelling need to say it. now or never, now or never, now or never....

"you did well in your last quiz," the older hummed quietly, steering into the collection of houses and keeping his eyes trained on the road. "your music skills are getting better."

"thanks...." the shorter responded stiffly, blood flowing to his legs so intensely that he could barley feel them. shit, they feel like jelly, he thought in a spot of anxiety.

the car parked outside his house, rain still hammering down and warm breaths creating thick condensation on the windows. neither could really see out of the windows, nor could others see in.

not a soul was wandering about in the rain, anyway.

"yang," kun sighed, leaning his head back and watching the bad weather continue. "are you okay? we haven't.....we haven't really talked alone in a while...."

the younger shyly looked up at him, nerves spiking and hands playing loosely over his lap. "i'm okay," he murmured, tilting his head. "just....just lonely."

"lonely?"

"'mmm. there's always been this one thing i've wanted to do again......but i could never. something only you and i know...."

kun chewed the wall of his cheek, desperately attempting to calm himself down and failing miserably. had he known the boy would remind him of that night, he would've properly mentally prepared himself.

"yangyang, this is—"

"bad? i know. it's really bad...."

"yet you're still upset."

"i'm a stupid kid. what would i know about feelings and maturity?" he challenged, trying to show that he had grown up since then. that he wasn't a little boy anymore. kun knew it all too well already, though. having watched him mature with his own eyes.

"can i kiss you?" the ravenette enquired quietly, maintaining serious eye contact as the older shifted uncomfortably in his seat.

"i'm your teacher, yangyang. that's a terrible idea."

"so it's a 'no'?"

".......i didn't say that...."

"then do it. nobody is here to stop us, so kiss me. we'll never get to again...."

kun wasn't sure what came over him. before his mind computed with his body, he was already pulling the shorter over the seat and into his lap. yangyang gasped, holding onto his shoulders for balance.

they quickly leaned in and connected for a heated kiss, skipping the pleasantries and racing straight into the passion. the more time they wasted, the more regret they would feel later on.

yangyang delicately wrapped his arms around the other's neck, deepening the kiss as kun shoved his tongue into his mouth, immediately assuming dominance and leaving the younger to elicit needy noises and pants.

the ravenette could hardly wrap his mind around what was happening, still at the stage of discerning whether it was a dream or reality. his hips gently rocked against the other's, begging for anything he could give, since their time was limited and occasions even more so.

kun could hardly contain himself, gripping his waist and devouring every inch of his mouth. the steam created within the car fogged up the windows further, making it impossible to see inside or out.

yangyang broke away, needily tugging at the older's shirt and whimpering. his body was tingling, and it always had when he thought of these things with his teacher.

the older chuckled hoarsely, ignoring his request and instead, taking the other's off. once the younger's chest was exposed, shirt hanging down around his mid-arms, kun then got to work on creating pretty little love marks all along his pale skin. yangyang threw his head back, gasping as the older's wet tongue glided along his collar bones.

the pulsating heat between his legs grew more painful the longer they neglected it, so the dark-haired boy quickly and skilfully rid himself of his trousers and underwear. now straddling the older's waist bare, both were down to the last layer that held them back from fulfilling what they had always wanted. what was now apparent to both.

"are you sure about this, love?" kun whimpered gently against his ear, breathing heavily as the younger carefully unzipped his pants.

"of course," yangyang replied quickly, "i've wanted you since i was fourteen, and i'm eighteen now."

"well then, don't scold me if this isn't what you expected," he chuckled darkly, shoving his fingers into the other's mouth and playfully fighting with his tongue. once wet enough, he expertly inserted them inside one at a time, scissoring and stretching as the pull made the ravenette wince and whine.

before long, both could tell he was ready, what with the pained sounds becoming those of pleasure, and the entrance wide enough to fit something in.

"ready?" kun smiled knowingly, lifting him up by his hips and lining him up.

"mmm," yangyang breathed out laboriously, releasing a low cry as he slid down onto the older's member. it hurt, of course. it was his first, and hopefully not the last he'd ever get from kun. he clung tightly to the brunette as his body adjusted to the size, scolding him for using it in a way he wasn't meant to.

eventually, the burning sensation sort of numbed into a tingly and desirable one, making the shorter's hips start to move on their own adventurously. kun sat back for a moment, letting the teen find his rhythm and what worked before taking the lead once again.

yangyang huffed out uneven breaths, moving up and down until suddenly his hips were held down and the member inside him was roughly thrusted up to reach further. he cried out, head thrown back as lewd noises and sinful moans escaped his parted lips.

each time kun thrusted up, the younger shuddered from ecstasy, trembling in his arms with every movement. he had never felt this way before; the heat below and the warmth stretching out through his body and stomach.

he leaned in again with heavy pants, reconnecting their lips and revelling in the taste of the man he loved. the sensation he brought as well as the excitement of breaking the rules.

renjun would surely be upset if he ever found out. but that was the thing, wasn't it? keeping it a secret.

"yang, i'm gonna—" kun whined, hips moving more irregularly and chest heaving with need. yangyang could barely stay upright as they reached their highs, heat swelling in the pits of their abdomens and threatening to burst.

neither wanted this to end though. as soon as they let go, it was all over and back to reality. how could they return to the way things were when they had finally tasted each other?

"kun—" yangyang shrieked, the male hitting his prostate head on and leaving him no choice but to release. strings of white littered their chests as he sobbed in both pleasure and sadness, never wanting to let go. his hips ached as the older continued to pound into him, lasting only a minute or two longer before releasing deep inside of him.

part of them wondered if they could just start again. rewind the clock and bathe in each other's presence for just a bit longer.

but that was wishful thinking, and they were adults now.

the brunette slumped onto kun's chest, panting harshly and unable to feel his entire lower half. his thighs were trembling, and he wasn't even sure what for.

white liquid leaked from his ass and onto the car floor, though kun didn't care. he cradled his love in his arms for the remaining time the rain had to give.

things could never possibly be the same now. it was just a matter of working out what they would do differently.

word count: [2655]

sorry if this seemed a bit 'meh' in comparison to what i'm able to write now, since i adapted this from a chapter of an old oneshot i did a while back. i just needed some kunyang and this story fitted them~