Work Text:
"How long do I have to sit here?" Hanbin shook his leg, sitting alone in the classroom.
He had failed biology for the 3rd time and now was forced to take a supplementary class after school, still stuck here even after everyone else left. The school was completely void of anyone but the two.
"Until you finish the reproduction chapter. It's the most important one." hao said, nudging his rectangular glasses higher with a lazy flick of his fingers, not even glancing at Hanbin while he focused on the novel in his hands.
Hao was half-leaning against the teacher’s desk like he’d been standing there too long and got tired of holding himself up.
His silk shirt kept slipping around his shoulders every time he moved, sleeves rolled up in uneven folds he clearly didn’t bother fixing. The black dress pants were a little too formal for how messy he looked right now, but somehow he still made it work in that distracted, accidentally-hot way.
"ugh this is torture!!" Hanbin slammed his head into the desk.
"I can't understand anything...." his muffled voice came through.
"Well then you should have paid attention when I was teaching this in class." Hao said firmly, completely leaning against his desk—eyes still on his novel.
"But teacher.....i just can't help it. Biology is so boring, I fall asleep every time." Hanbin raised his head just a bit to speak his mind, eyebrows furrowed in distress.
"How am I supposed to remember everything about the female reproductive part when I myself don't have it?!" Hanbin jabbed his finger on the book, at a diagram of the vagina.
"Because it's important, and it's in your syllabus." Hao scolded, looking down at Hanbin as he finally slammed his novel close.
"I cant remember anything about it…." Hanbin whined, banging his head on the desk again.
Hao sighed and put his novel aside. He striding to hanbin’s desk and placed his palms on his table, towering over the student. "Have you seriously never seen a vagina before?” Hao asked with an unimpressed look.
"N-no... obviously not." Alarmed by the sudden distance, Hanbin lifted his head up from the table and leaned back.
The boy was clearly flustered.
Hao raised an eyebrow.
"Have you never even watched porn?"
"P-p-po-porn?!?" Hanbin stammered, his face completely red and eyes wide enough to pop out of his sockets.
"N-no way!" Hanbin looked away, his exposed neck glowing bright pink.
Hao's eyes widened in amusement. "And you are in the last year of high school already?"
Hanbin looked back at hao, his eyes shaking. "I-its a bad thing...how can I watch it?” he spoke in a pout. “If my mom finds out, she will kill me."
A soft chuckle echoed in the empty classroom.
“A Mama's boy? So cute." Hao murmured under his breath, intrigued by the younger’s innocence.
"Hmmm I have an idea, hanbin." Hao walked back to his desk, his shoes clicking on the tiles,"You can't understand anything from the book and you can't watch porn either to see what a vagina actually looks like, correct?"
Hao turned to face the younger,casually leaning against the table.
Hanbin nodded hesitantly.
"How about you don't have to do either of that, yet you get perfect knowledge about the vagina?" hao’s eyes sharpened, a confident smirk on his lips.
"Well that would be great..." Hanbin agreed.
"Then come here, to the very first bench." Hao pointed at the desk right in front of the teacher’s table, hanbin following as told.
"Hanbin-ah, keep your eyes and ears open now alright? Teacher will use himself to demonstrate the parts of the female genital." Hao casually explained, Hanbin's face flushing crimson.
"B-but sir! Are you sure–" He asked for confirmation with wide naive eyes.
"Hmm, I am." Hao nodded as he unzipped his pants to strip.
"But still sir! H-how can I see you l-like... that." Hanbin looked elsewhere, his eyes shaking as hao started to slowly pull his pants down.
"Hanbinie, I am a very sincere teacher, I must clear my students' doubts anyhow." He was completely naked from his waist down now.
Hao took a stick from his table.
"It would be great if Hanbin did as teacher tells him to do.” Hao's voice dripped in honey and venom, as he tapped the stick on his palm with narrow eyes.
Hanbin gulped, nodding once again. Well, barely nodding.
"Now be a good boy, and pay attention. You want an A+ on your biology test, right binnie?" Hao smiled, his voice sugar sweet and so sultry.
With that hao leaned on his desk, sitting on top of it and spread his legs for a clear, unobstructed view—sitting in a ‘M’ shaped position. His pink, flushed pussy quivered with hunger and greed right in front of hanbin’s face.
Hao took the stick and spread his pussy with it, hanbin trying his best to keep his eyes up, his throat was completely dry.
“See this is the ‘Labia majora’ or the outer lips of a vagina.” hao nudged his outer folds with the stick, his eyes on his own intimate area as he taught. “And when you go a little inside….” hao spread his outer lips apart with the help of the stick, revealing much lighter, pinker folds of skin—dripping wet to the point that strings of thick fluid clung to the stick as he moved it around. “T–this is the ‘Labia minora’...” hao’s breath shuddered as he accidentally rubbed the stick on his clit. “Take a good look…” he used two fingers to properly spread his pussy apart, his breath hitching as cold air hit it, making his thighs tremble.
Hanbin gulped again, feeling his pants get tighter.
“W-why is it…so–so wet…?” he trailed off watching thick, translucent fluid drip down hao's folds.
“Well a vagina is always wet, especially when aroused. But the thickness of my fluid is more today because I am ovulating. But we will get into that later.” hao let go, stretchy, creamy string of his slick clinging to his fingers.
“Did you understand this much, hanbin?” hao asked, looking up at the student—who’s jaw was wide open and drolling.
Hanbin snapped his back straight, wiping saliva off his chin. “Y–yes sir…” he gulped down the excessive droll forming in his mouth, his adman’s apple bobbing nervously.
“Good, because now we’ll look at the clitors.” hao’s voice lowered down as he concentrated his vision on the sensitive bundle of nerves. “I-its right here–nghh.” he placed the stick on his clit.
He was feeling extra sensitive because of how exposed he was.
Hao bit his lip hard, his head tipping backwards for a second as he let out a soft whimper while rubbing the stick in a circular motion on his clit. “I–its the most sensitive area—the female e—erectile—fuckknghhh.”
Hanbin eyes stayed locked on the explicit scene, his breath coming out shallow. “Holy shit….” is all the boy could whisper out as he watched his teacher break down in front of him.
“Its resp—-mghh—fuck….it’s responsib-ble for pleasure….as you can already see.” hao’s stomach fell and rose, his pussy twitching with need as more slippery slick gushed out of his folds, pooling down on the table to form a puddle of filth.
“T—teacher….i—i don't think we should—-” hanbin fumbled with his words as hao's moans got louder and hanbin’s ears got hotter.
Hao's clicking tongue interrupt hanbin's stammers.
“Hanbi-ah, you don't need to think.” He said with an unimpressed look. “Just listen,” Hao's hand crept under Hanbin's collar, grabbing it roughly, "And watch.” Hao spat, yanking hanbin forward, his face inches away from his throbbing heat.
Hanbin gulped hard, licking his dry lips out of nervousness.
Hao's hands danced up to hanbin's chin, his slim, perfectly manicured fingers digging into the younger’s cheeks. “Also.” Hao lifted hanbin's head to make him look right into his eyes.
“If you interrupt me one more time…. things won't look good for you.”
“Am i clear?” Hao's sharp eyes stared into hanbin’s, demanding an answer which should be nothing else but ‘yes.’
“S-sorry teacher,” hanbin nodded quickly, like a timid lamb being eyed by his predator.
“I—I won't interrupt you anymore.”
“Good boy.” Hao smirked. “So obedient.” He let go of hanbin's jaw, retrieving his hand to lean on the table and resume with the ‘lesson’.
“Alright, so where were we?” Hao asked, picking up his stick again.
“S-sir, the clit.” Hanbin asked, his eyes shying away.
“Hanbinie~ don't look away, if you don't see, how will you learn?” Hao moved closer to the edge of the table, to make their proximity as much as possible.
“See, this is the vaginal opening, the place where a penis goes for the process of reproduction.” Hao slowly shoved the tip of the stick inside his pussy, pushing it in till he reached the limit. Hao swallowed hard, feeling the thin stick deep inside him.
“Ha…♡ it's so deep…fuck.” Hao gasped, thrusting the stick in and out of himself. “See how deep a penis can go?” Hao looked right into hanbin's eyes, whose breath hitched at the eye contact. Hanbin immediately ripped his gaze away from the teacher before timidly bringing it back to look hao in the eye.
hao took the stick out, which was not glistening with his slick, and put the tip in his mouth, sucking and slurping at it while maintaining eye contact with hanbin.
“the lesson is over now…r-right teacher?” Hanbin asked, his eyes darted back and forth, his palms wet with sweat.
“What? Not at all.” Hao laughed. “We have just started hanbin.” He said calmly, taking hanbin’s hand.
“Touching a real vagina will make all the theoretical knowledge stick. Don't you think so?” He asked with a predatory grin, bringing Hanbin's hand to his pussy to stroke it.
“Come on now, be a good boy and do as teacher says, alright?” Hao breathed out, his voice laced with whimpers.
Hanbin nodded hesitantly, feeling the wet heat. “Teacher…it’s so wet..” he almost gasped in amusement, watching the sticky wetness connect his fingers and the pussy even when he pulled his hand away for a bit.
“Hanbin, keep touching it. Don't stop, okay?” Hao explained, moving his hips in deliberate circles. “Move a little higher—ah fuck yes.” hao exhaled as soon as hanbin's fingers landed on his clit. “Now go in circles.”
He directed, hanbin following through. “Oh fuck yes yes yes yes right there, keep rubbing there—fuck.” hao's head tipped backwards for a bit before he brought back up to watch hanbin's thick fingers fiddle with his clit. Hao's eyebrows furrowed with pleasure, his cherry red hair tousled over his forehead messily.
Hanbin’s hands moved clumsily, an obscene squelching sound filling the room. Hao’s hips twitched involuntarily, his head constantly tipping backwards with pleasure even when he tried his best to keep it up.
“Oh god—-fuck—feels so good. Such a good boy for teacher ♡” hao praised, sitting up a little more straighter to get ready to the next ‘lesson’.
“Now put a finger inside, feel the cervix—it connects the vagina to the uterus.” hao guided hanbin’s slicked up fingers to his hole.
“A–are you sure sir—-” Hanbin hesitated.
“What did I tell you about keeping your mouth shut?” hao snapped, his sharp eyes rolling with annoyance.
“Sorry sir….” hanbin lowered his head apologetically.
“Now dont waste my time and do as told!” hao commanded.
Not wanting to upset hao any further, hanbin finally shoved his index finger inside—his motions were completely amateur and slow.
“So wet….shit.” he said under his breath, thrusting his finger as deep as he could.
“Ha…fuck ♡” hao’s stomach rose and fell, his eyes glued to place where his body connected with hanbin’s. “Now push and pull your finger inside—to understand the texture.” hao guided hanbin, his trembling fingers making the younger thrust his finger in and out of his pussy.
“Faster—fuck.♡” hao whimpered, retrieving his hand back to let hanbin do all the work.
“Yes just like that, you are such a fast learner ♡” he smirked, his bottom lip between his teeth to control his moans.
“Thank you sir….” Hanbin's stomach flipped with excitement at the praise, his hand moving faster.
“Now add another finger.” hao urged the younger, hanbin following through. He added his middle finger as well, his thick digits thrusting in and out of hao’s wet heat.
“Yeah♡ j-just like that—shit.” Hao breathed. His slender hand slid to the back of Hanbin’s head, drawing him closer, closer, until his pussy was right in front of his face. The musky scent alone was enough to scatter Hanbin’s thoughts. His mouth watered, desire written plainly across his face as he swallowed hard.
“Hanbin-ah,” Hao murmured, voice low and knowing, “why don’t you use your tongue? Once you taste it, this lesson will stay with you forever, yeah?”
Hanbin nodded eagerly, instantly attaching his mouth to hao’s clit while his fingers moved at a steady pace.
“Oh god—fuck yes!” hao’s eyes rolled in head, his hand still playing the hanbin’s hair as he shoved his face deeper into his pussy. “So good….so fucking good ♡” his head tipped back involuntary for the nth time. “Keep going—yesyesyesyes!♡” the rise and fall of hao’s stomach got faster, his eyes going white again. “I—cant! I cant hold it in anymore♡” hao choked a pathetic sob, bitting his swollen lips hard enough to draw blood.
“Oh no ♡ i—-i am cumming—i am cumming on my student’s tongue—-oh no ♡!” hao’s back arched off the table, his eyes rolling in head as his mouth fell open. A tight, beautiful bow as the orgasm ripped through him. A flood of slick, hot fluid gushed from his pussy, coating Hanbin's tongue and chin. Hanbin didn't let up, his tongue flattening against Hao's clit to draw out every last wave of pleasure. His free hand gripped Hao's thighs to hold him in place, his fingers never stopping the thrusting motion.
"Ah... Hanbin-ah... s-stop... It's too much... ♡" Hao sobbed, his hands fisting in the hanbin’s hair, his body trembling uncontrollably. The overstimulation was intense, a white-hot pleasure that bordered on pain. He felt like he was shattering apart, piece by piece, and it was all because of his student.
Finally, with a sharp tug on his hair, Hao pulled Hanbin’s head away. "Ah... Hanbin-ah...stop ♡” Hao sobbed, his body twitching involuntarily.
He looked down at the younger boy— at his dazed expression and his face, at his chin and tongue glistening with Hao's release.
A slow, wicked smirk spread across Hao's lips, the "teacher" persona snapping back into place with a vengeance. "Look at the mess you made, Hanbin-ah," he panted, his voice coming out in a low, husky purr.
He swiped a finger through the slickness on Hanbin's chin. "Did you enjoy the lesson?”
Hanbin could only nod, his mouth slightly agape, eyes wide and innocent. "Y-yes, sir..." he whispered with a hoarse voice.
"Good," Hao smirked. He slid off the desk, his legs a little shaky. “Stand up.” he ordered, hanbin following his word like a trained dog.
"Because you were such a good student, and made your teacher feel so good... I think it's time you learned about the male contribution to reproduction." Hao slowly sank down to his knees, gripping hanbin’s thighs to keep balance.
He wasted no time, fumbling with hanbin’s school belt and pulling his pants down to reveal the younger, rock hard, leaking cock.
“My my…” Hao breathed, his eyes going a little cross-eyed as he took in the sight. He gave the flushed head a small massage with his thumb, smearing the pre-cum around. “You’re so big, Hanbin-ah.”
“T-teacher… please!” Hanbin’s knees buckled, and he instinctively took hold of the nearest table for support, his whole body trembling under Hao's intense gaze.
“Stay still, Hanbin,” Hao ordered, his voice coming in a low murmur. He wrapped his hand around the thick shaft, giving it a slow, deliberate stroke that made Hanbin gasp.
“There’s more…?” Hanbin asked, his voice a shaky whisper. Hao chuckled deeply, the sound vibrating through Hanbin's body.
“The lesson’s just started,” he explained, his eyes glinting with wicked promise. “You’re not leaving until we reach the most important part of the chapter: the actual process of reproduction.” he smirked, hanbin swallowing hard for the nth time to brace himself for what was to come next.
“Okay kids.” Hanbin clapped his hands, his voice booming through the classroom. “Enough chatting, I am gonna need y’all to be quiet while I dictate today’s activity.” he leaned forward, using the teacher’s chair for support. “Today, we will be playing soccer so start moving to the ground and line up according to your—-”
However a soft knock on the door made all heads turn.
“Uh…excuse me.” Zhang hao stood by the door, bio books cradled in his hands.
“Ah, Mr. Zhang? What brings you here?” Hanbin straightened his back, flashing an easy, professional smile.
“Good morning Mr. Sung.” Hao smiled back.
“Morning, sir.” Hanbin nodded firmly.
“Actually,” Hao began, his eyes sweeping over the restless students before landing back on Hanbin. “I was reviewing the syllabus and realized we are significantly behind. With finals just around the corner, I was wondering if you would mind me borrowing this period to catch up.”
A collective groan rippled through the class. Students started shaking their heads, a few of the bolder ones calling out, “But Mr. Sung, we were going to play soccer!”
Hanbin’s expression softened as he looked at his disappointed students. He turned back to Hao, his own smile now tinged with apology. “I’m really sorry, Mr. Zhang, but I’m afraid I can’t allow that. The kids only get two P.E. periods a week. They need some exercise in their schedule.”
“Sir …..but you don't understand, it's a very important chapter.” Hao bit his lip slightly, feigning nervousness as his hand discreetly brushed his hand over Hanbin's arm.
“It's the reproduction chapter.” His fingers subtly tightened on Hanbin’s forearm.
Hanbin froze. Every muscle in his body went rigid. The air crackled, the shouting kids and chaos in the classroom evaporating for him, replaced by a thick, charged tension.
Hao’s lips curved into a slow, cruel smirk—-a private victory.
He leaned in even closer, his voice a low, dangerous murmur that sent a shiver down Hanbin’s spine.
“You, out of all people, should know how important that chapter is… Mr. Sung.”