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A Lesson in Chemistry

Summary:

Steve is failing one of his classes. It’s not his fault that he spends all day fantasizing about his hot teacher. Mr. Stark offers to help him out and it’s an offer Steve can’t refuse.

Notes:

This is for my friend and I hope you love it! This might be the dirtiest thing I’ve written so far 😏

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Steve liked to believe that he was an exceptional student. He was rarely late to his classes and he did his best to show up for each one. He strived to be successful, wanting to make his mother proud. But despite working hard and constantly studying, he managed to get behind in one of his classes.

Science had never been his strongest subject. If he worked hard enough and focused he could pass the class with a decent passable grade. It’s worked for him in the past, so when he decided to take Mr. Stark’s chemistry class, Steve figured he’d be able to get through it.

He was wrong.

No one told him that his teacher was going to be one of the most attractive men Steve’s ever set his eyes on. Tony Stark was the kind of teacher that students fantasized about and others envied.

He was impeccably dressed in tailored suits that clung just right to his lean, muscular frame, accentuating his broad shoulders and trim waist. His shirts were always crisply pressed, often with the top button undone, revealing a hint of tanned skin and a tantalizing glimpse of his collarbone. The ties he wore were stylish and modern, adding a touch of sophistication to his already commanding presence.

His hair was dark brown, artfully deshelved in a way that made it appear that he spent no time on it, yet it always looked perfect. The slight sliver in his temples only added to his allure.

But if Steve had to pick his favorite feature on Tony, it would be his eyes. His dark eyes were striking, capable of switching from piercing intensity when he was making a point in a lecture to a warm, teasing twinkle when he caught a student’s joke or made one of his own.

The soft hum of the classroom buzzes around Steve, a mix of whispering students and pencils scratching against paper. Steve, however, was lost in his own world, his thoughts drifting to his incredibly hot teacher. His eyes drift over to the front of the classroom where Mr. Stark is currently giving a passionate lecture.

Steve tries to focus on his notes, but all of his attention is on Tony. He watches as Tony scribbles equations on the board, the muscles in his arms flexing under his shirt, and Steve can’t help but imagine what it would be like to be close to him, to feel the warmth of his presence, to hear that smooth, confident voice saying his name in a different context.

Steve shifts in his seat when a wave of arousal washes over him. He rubs his thighs together to gain some kind of friction, anything to satisfy the itch. But deep down there was only one person who could really satisfy him.

He imagines Tony leaning over his desk, their faces just inches apart as he explains something to him. In his daydream, Tony’s hand would brush against his own, sending a shiver down his spine. Steve pictures their lips meeting in a fiery kiss, Tony’s hand groping and squeezing Steve’s tits, while his other hand slides underneath Steve’s skirt.

Steve bites down hard on his bottom lip to suppress a whimper, his pussy throbbing as he imagines Tony touching him. No one’s ever touched him there before; he’s barely even touched himself. But he knows Tony has years of sexual experience and he would know just how to pleasure him.

Steve glances around the room, making sure no one is paying any attention, then when he’s sure everyone is absorbed in the lesson, he slides a hand underneath his desk and between his legs. His panties are soaked, a wet patch already formed in the front. Steve keeps his eyes on Tony’s back as he slowly circles his clit with his middle finger. Growing braver, Steve pulls his panties to the side, his fingers meeting the wet folds of his pussy. This time he does whimper, and he quickly clears his throat to cover it up.

Tony turns around then, their eyes meeting for a moment before he continues on with his lecture. Steve rubs his clit harder as he listens to the smooth sound of Tony’s voice, imagining him touching his pussy while he whispers dirty things in his ear.

It’s all too much, the pleasure building and building until Steve can’t hold off anymore. He rubs his clit harder, his belly coiling as he finally reaches his release. His fingers are left sticky, coating his fingers in thick, white cream. Steve quickly wipes them on his skirt, but he’s left a mess on the bottom of his chair.

“Rogers, are you with us?” Tony’s voice cuts through the fog of Steve’s thoughts, snapping him back to reality.

Steve jolts, his cheeks a bright pink as he realizes he’s been caught daydreaming. “Uh, yes, Mr. Stark. Sorry, just lost in thought for a moment.”

Tony’s lips curve into a knowing smile, his eyes twinkling with amusement. “Daydreaming during my class? I must be doing something wrong. What’s on your mind, Steve?”

Steve swallows hard, his heart pounding in his chest. “Just trying to understand the concept better, sir.”

Tony nods, his smile growing wider. “Good to hear. If you have any questions, don’t hesitate to ask. That’s what I’m here for.”

Steve quickly nods his head, his face still burning as he forces himself to focus on his notes. But even as he tries to pay attention, his mind keeps drifting back to his daydream, the image of Tony touching him all he can think about.

The rest of the class passes in a blur. When the bell finally rings, signaling the end of the period, Steve gathers his things slowly, trying to compose himself and make sure the evidence of his early activities were properly dealt with. As the other students file out of the classroom, Tony calls him over.

“Steve, can you stay for a moment?”

Steve’s heart leaps into his throat as he approaches Tony’s desk, his palms sweaty. “Yes, Mr. Stark?”

Tony leans against his desk, his gaze thoughtful. “I’ve noticed you seem a bit distracted lately. Is everything okay?”

Steve nods quickly, trying to keep his voice steady. “Yeah, everything’s fine. Just… a lot on my mind.”

“I can tell. Your grades are slipping.”

Steve’s heart sinks. He couldn’t get bad grades, not after how hard his mother worked to get him into this school. He had to do better.

“Is there anything I can do?” Steve asks, hopeful that his teacher would be willing to work with him instead of just failing him.

Tony studies Steve for a moment, then nods his head. “I think I have something in mind. Come by tomorrow at the end of the day, and we can work together. Sound good?.”

Steve’s heart skips a beat at those words. Tony had something in mind? Steve’s thoughts immediately return to his fantasy, his pussy throbbing in response. “Thank you, Mr. Stark. I appreciate that.”

Tony smiles warmly. “Anytime, Steve. Take care.”

As Steve leaves the classroom, he can’t help but glance back, catching one last look at Tony. He couldn’t wait to see him again tomorrow.


Before making his way to Mr. Stark’s classroom after the final bell, Steve slips away to the bathroom to freshen up. All day and all night he had been thinking about Tony’s offer to help him get his bad grades in good standing. It was kind and thoughtful of him, and Steve wanted to return the favor.

He quickly locks himself in the largest stall toward the back and begins to change his uniform. The skirt he’s chosen is from last year. It still fits around his trim waist, but the length is much too short on him now. It’s perfect. Well, almost. He goes a step further and removes his panties, leaving him completely bare underneath.

Once he deems himself presentable, Steve exits the bathroom and makes his way down the hall to Mr. Stark’s classroom, a shiver running up his spine when he feels the cool air brush against his bare pussy. He’s already getting wet at the idea of Tony seeing him like this.

Steve stops at the door, taking a moment to adjust his top and undo a few of the buttons. He smoothes a hand over his skirt, then with a smile, he knocks on the door, receiving access not even a minute later.

Tony is sitting at his desk grading papers, and he looks up when Steve enters the room. He smiles politely, but then Steve notices the way his eyes roam over his body, drawn to his tight shirt and short skirt. Tony swallows hard and beckons for Steve to come in and have a seat near his desk. Tony stands and pulls up a chair, placing it right beside his own.

“Thank you again, Mr. Stark,” Steve says, taking the offered seat. “My mother would kill me if she knew I was failing a class.”

“It’s not a problem. I don’t want you to fail my class, Steve. You’re smart and I know you can do better,” Tony says, and returns to his desk to finish grading.

“I’m trying.”

“I know you are. Maybe try to focus a little more, hmm?”

Steve nods, a blush creeping up along his face. If only Tony knew what he was really focusing on.

“Go ahead and work on the assignment for today while I finish up these papers. If you need help, I’m right here.” Tony smiles a reassuring smile that has Steve’s heart fluttering.

“Okay, Mr. Stark,” Steve replies, and he pulls out his work and a pencil.

“You can call me Tony. We’re not in class now.”

“Oh. Okay then…Tony.”

Tony smiles at him, then he turns away to get back to his work.

Steve tries to focus on his own, but after a few minutes of staring at the paper and the blank spaces that require his attention, he finds that he can’t focus on anything other than the gorgeous man sitting next to him.

They haven’t said much to each other since they started working independently, but occasionally Steve would catch Tony staring at him. His eyes would sometimes land on Steve’s tits, lingering there for a moment before drifting down to his exposed thigh. It makes Steve wet.

Steve decides to see how far he can go. He wants to make sure Tony is really interested in him before he makes a fool of himself. He’d never forgive himself if he ended up expelled.

“Mr. Stark?” Steve says, his voice soft and unsure. “I think I need help.”

Tony peers over at him. “What’s up?” he moves his chair closer, their bodies just inches apart. He leans in close to get a peek at Steve’s work, the proximity of his presence makes Steve squirm in his seat. “You okay? You don’t need to be shy around me. I’m here to help.” Tony places a hand over Steve’s shoulder, the touch making Steve’s heart race.

Steve nods. “Thank you, Mr. Stark. I mean, Tony.”

“Don’t hesitate to ask for help,” Tony says, his touch lingering and his eyes once again falling to Steve’s exposed thigh. Steve squirms under his gaze, and Tony chuckles softly.

“Do you need any more help?”

Steve shakes his head. “N-no, sir.”

Tony smirks. “Let me know if you do.”

Steve nods, promising to ask for help if he needed it. He waits until Tony is back to grading papers before making a move.

He purposely lets his pencil slip from his hand and hit the floor. “Oops,” he says, and he gets up from his seat, turning around and bending over to get it, giving Tony a perfect view of his tight ass and swollen pussy lips.

He hears Tony gasp behind him and a smirk forms over Steve’s lips. Steve turns his head to glance over his shoulder, finding Tony’s eyes glued to his pussy. Tony looks up and locks eyes with Steve.

“Well, well, well,” Tony says, a grin spreading across his face. “Someone’s eager to learn.”

Steve smiles shyly, his face a bright pink. He straightens up and turns around to face Tony, playing with the hem of his skirt and lifting it slightly to show off his mound. Tony licks his lips and beckons Steve over, his legs falling open to make room for Steve to fit between them. Once Steve is close enough, Tony takes his hand and pulls him in even closer.

“God you’re so sexy,” Tony says, his voice low and husky. “I didn’t know you were a little slut, not wearing any panties and bending over like that.”

Steve whimpers, his thighs rubbing together as more slick leaks from his needy pussy. Tony chuckles at Steve’s reaction and hooks a finger under Steve’s chin, urging him to lean in, and once he does, their lips meet.

Steve can’t help but moan when Tony slides a hand underneath his skirt and brushes his fingers against his cunt. He spreads his legs a little more to give Tony better access, a surprised gasp escaping him when Tony circles a finger around his clit.

“You’re so wet for me, Steve. Is this what you’ve been daydreaming about, hmm? Me touching you?”

Steve nods his head. “Yes!” he gasps out when Tony dips his finger lower and presses against his wet hole.

Tony grins and pushes inside, feeling how tight Steve is around his finger. “You’re so tight. Have you ever been fucked before?”

“N-no,” Steve stammers. “I’m a virgin.”

“Yeah? Do you want me to pop your cherry, sweetheart?”

Steve nods again. “Please, Mr. Stark,” he begs, grinding against Tony’s hand.

Tony removes his finger and slaps Steve’s ass, chuckling when Steve yelps in surprise. “Lie down on my desk, baby and show me that pretty pussy.”

Steve does as he’s told, lying down on Tony’s desk and spreading his legs wide. Tony pushes his chair closer and lifts away Steve’s skirt, his gaze hungry as it roams over Steve’s glistening folds. He slides a finger back in, causing Steve to moan and throw his head back. Tony adds another finger, stretching Steve open. Steve squirms under his touch, his moans getting louder.

Tony leans in and attaches his mouth to Steve’s clit, sucking on the sensitive nub. Steve cries out and his hands fly between his legs, gripping Tony’s head. Tony smirks against Steve’s pussy and slides his fingers back inside, thrusting them roughly as he searches for Steve’s G-spot.

“Shit!” Steve cries out when Tony teases that spot inside of him. The pleasure was too much, he’s never experienced anything like it before.

Tony continues to suck his clit and finger him, dialing up the pleasure until Steve is teetering over the edge. His belly tightens and he squirms, a new sensation he’s never felt growing and growing. It finally releases and he cries out, his pussy squirting for the first time, the warm liquid spraying Tony in the face and making a mess of his desk.

“Fuck,” Tony groans and pulls away, his face wet with Steve’s juices. Steve is shaking, his legs trembling and struggling to stay open from the aftershocks. Tony gently pats Steve’s pussy, a trickle of liquid leaking from Steve’s fluttering cunt. “Good boy,” he says with satisfied grin.

Steve blushes from the praise and he throws an arm over his face to cover up his embarrasment. Tony stands and carefully removes Steve’s arm away, urging Steve to look at him.

“Don’t hide, baby. You’re so beautiful. You’re so incredibly sexy, squirting like that all over my desk. It was so hot.”

“I’m sorry I made a mess, Mr. Stark.”

“Don’t be. I like it.”

Steve smiles shyly and opens up his legs, exposing his swollen pussy. Tony glances down and reaches between Steve’s legs, sliding a finger through Steve’s slit.

“Do you want me to fuck you? I need your permission, Steve.”

Steve nods. “Please fuck me, Mr. Stark.”

That’s all Tony needs and he quickly makes work of unbuckling his belt and slides his slacks down along with his underwear, his thick cock springing free. Steve’s eyes widen as he gets a look at his teacher’s cock for the first time. He always tried to imagine what Tony’s dick look liked, but none of his fantasies ever prepared him for the real thing. It was long and thick, the head red and leaking precum. A patch of neatly trimmed hair was above it, and below hung a pair of heavy balls. Steve licks his lips as he imagines what Tony’s cock would feel like in his mouth.

“You’re so big, Mr. Stark.” Steve sits up and stretches out a hand, wrapping it around Tony’s cock, causing the older man to moan. “Is it gonna fit?”

“It’ll fit, baby. It’s gonna stretch that pretty little pussy,” Tony says, bucking his hips into Steve’s hand. “Fuck, wait. Bend over my desk. Let me fuck you.”

Steve grins and eagerly gets into Tony’s desired position, bending over the desk and lifting his skirt up, wiggling his ass to entice his teacher. Tony groans and slaps Steve’s right cheek, then the other before grabbing a handful of Steve’s ass and squeezing.

“I love this ass. Best fucking ass I’ve ever seen. Maybe you’ll let me fuck it next time, hmm?”

Steve moans, already excited about another encounter with his teacher. “Please, sir?” he begs, spreading his legs wide and reaching behind to open himself up, his pussylips spreading, showing off the pink flesh coated in white cream.

Tony groans and grabs his cock, leading it Steve’s needy pussy, sliding his cock between the fat lips. Steve moans and pushes back against Tony, urging him to do more than just tease. Tony obliges and slides his cock inside, the head popping in first followed by the rest of his thick length.

“Fuck, Steve. You’re so fucking tight.” Tony grips Steve’s hips and begins to move, thrusting soft and slow, then picking up the pace, his heavy balls slapping against Steve’s ass.

“Yes!” Steve cries out, his eyes fluttering shut and he scrambles to find purchase, his fingers wrapping around the papers Tony had been trying to grade earlier. “Fuck my pussy, Mr. Stark.”

“I am, baby. I’m fucking you so good, huh? Fuck, this pussy is amazing.” Tony glances down to watch as his cock pounds into Steve’s cunt, the lips wrapped tightly around his shaft. He groans and brings a hand down against Steve’s asscheek, causing Steve to moan and squirm. “How do you like your first taste of cock? Is everything you dreamed about?”

Steve can only manage a nod, his ability to speak stolen. His fantasies didn’t even come close to the real thing. He never knew he could experience anything like this before, and he couldn’t wait to do it again.

“I want you to come on my cock. Can you do that for me, sweetheart? I promise you’ll get an A in my class.”

Steve whimpers and reaches between his legs to rub his clit while Tony fucks him harshly. The feeling of Tony’s thick cock filling him up and the stimulaton to his sensitive clit is too much, and that same sensation from earlier begins to build.

“Fuckfuckfuckfuck.” Steve rubs is clit harder until he squirts, his pussy spasming as it gushes around Tony’s cock.

Tony thrusts faster, fucking into Steve harder, his own release following. He comes with a grunt, his hips growing still and pressed against Steve’s ass, his cock twitching as it unloads into Steve’s pussy.

Tony slowly pulls out, watching as Steve’s pussy flutters and gapes. Steve bears down, forcing Tony’s thick cum to leak out of him, making an even bigger mess.

“I’m gonna have to fill you up again,” Tony says, grabbing Steve’s ass and spreading him open, his eyes glued to Steve’s messy pussy. “Maybe you can suck my cock next time, too.”

“Does this mean I pass, Mr. Stark?” Steve asks, softy, turning to glance over his shoulder at Tony.

“I don’t know, baby,” Tony says, thinking it over as he rubs his finger through Steve’s slit. “I think you might have to come by again tomorrow for another assignment.”

Steve grins. He couldn’t wait.