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Summary:

Allen wants better sex education. Actually, he wants to see it in practice (and Krauss helps him).

Notes:

Hello again! Yes, I have multiple pairs I want to write about in TRUMP series and this is one of them! I was always weak for teacher/student tropes. Enjoy!

(See the end of the work for more notes.)

Work Text:

“Teacher Krauss, please show me how to do it!”

Krauss gulped loudly, his hands shaking. He wondered how he always ended up in situations like this.

“Allen, please… This is a bad idea!” he reprehended. “You already know everything you need to, you had sex education classes!”

“But I need to practice!” Allen kept swinging his feet while sitting over the ledge. “I can’t disappoint Lulumina!”

“You are not going to have sex with that human girl, have you lost your mind?” Krauss screamed. “What if she ends up getting pregnant?”

“Chill, that’s why I asked for your help!” Allen grinned. “I need to know if there’s a way to prevent it!”

“But still!” Krauss was frustrated. “This is a horrible idea! What if you end up impregnating her anyway?”

“Trust me, it’s going to be fine!” Allen smiled confidently and Krauss rolled his eyes. “I just need you to show me a way!”

“Why don’t you ask Pietro for this type of thing instead?” Krauss massaged his forehead, he was already getting a headache. “I am a teacher and old enough to be your father, do you know what would happen to me if anyone finds out?”

“You’re much more experienced than Pietro, it has to be you!” he insisted. “Relax, no one needs to know!”

“You brat!” Krauss cursed. “You’re going to give me white hairs at this point!”

Allen laughed and Krauss felt his heart racing. There was something about that boy that bewitched him. His light hair, long eyelashes, mischievous smile…It all made Krauss insane. Krauss wanted Allen all for himself. He cursed every time he heard Allen say that human’s name, she shouldn’t be with Allen, with his Allen. He wanted to spend eternity with that boy, and yet, he couldn’t keep Allen away from that god damned human village. Maybe… Maybe he should consider Allen’s offer, he thought. Maybe Allen could actually change his mind after it.

“Fine” Krauss exhaled. “ But no one else can know about this! Not even Pietro and that human girl! I really can’t afford being jailed at this point!”

“Relax, teacher Krauss!” Allen smiled and approached him, touching his face. “This will be our secret! Now, please show me how to do it!”

“Okay…” Krauss was so nervous, his whole body trembling. “First, we need to kiss.”

“Alright, here I go!” Allen announced and then, pulled Krauss closer.

Their lips met, Allen being inexperienced but very voracious. His mouth opened, his tongue forcing its way into the teacher’s mouth. Krauss squirmed, but allowed Allen to keep kissing him and wrapping his hands around his waist. Krauss knew it was a bad idea, but couldn’t help it. He craved for Allen’s touch since the day they met. Sure, getting involved could rightfully end his whole teacher career, but he didn’t care. He needed Allen. He needed to feel his touch, he needed to melt in his arms. So, just for that night, Krauss decided to give in.

When their lips parted, they were both grasping for air. Allen looked into Krauss’s eyes and he felt his whole body burning.

“What do I do now, teacher Krauss?” Allen licked his lips and stared at the teacher.

“Y-you can kiss my body too” Krauss replied, his voice shaky. “My neck, for example.”

Allen obliged, his mouth moving to the teacher’s neck, tongue and teeth brushing against his skin. Krauss moaned, feeling his body go limp. He leaned against the wall, allowing Allen to keep teasing him.

“Careful with your teeth…” Krauss warned, feeling weak. In fact, part of him wanted Allen to sink his fangs into his flesh and control him via initiative. The thought of Allen biting him and controlling his mind was enough to make Krauss hard, and Allen for sure noticed it.

The blonde decided to open the teacher’s cloak, exposing his pale chest. Allen kissed his neck, then his collarbone, then his chest… And soon his mouth found one of the pinkish nipples. Allen licked it, causing Krauss to bite his lip. Allen then sucked on it and Krauss couldn’t help but moan, grabbing a handful of blonde hair.

“Fuck, Allen…” Krauss cursed and the student smiled. “Where did you learn this?”

“Heh, I read some books!” Allen replied, his hands now reaching for the teacher’s belt.

“Why I’m not surprised?” Krauss rolled his eyes, helping him to unbuckle it. “Where are you getting pornography from?”

“I can’t tell you!” Allen smirked and started to touch Krauss, making him bite his lip again. “I just need you to show me how it works in person.”

Allen then got in his knees and took the teacher’s cock into his mouth, getting a moan from him in response. Krauss held his head, guiding him through. Allen sucked on his cock for a while, then moved his tongue to his balls, and then lower, and lower…

“A-Allen?” the teacher’s eyes got wide when he felt the boy’s tongue lick at his hole. Allen looked at him with a devilish smile and licked again,

Krauss pulled his hair, getting the boy’s tongue even deeper inside him. He couldn’t be too loud, absolutely no one could find out about that. So, he bit down hard on his sleeve, trying to muffle his own sounds. After some time, Allen backed off, face all wet with his own saliva.

“You really like that, don’t you? You’re a pervert, teacher Krauss!”

“Shut up, brat!” Krauss was as red as a tomato. “You’re a little fiend!”

“So angry, and for what? Now, suck my dick too, it’s only fair!” Allen grabbed the teacher’s hair and pulled him down, Krauss complaining but not doing anything to stop him, really. Instead, he just unbuckled Allen’s belt and pulled his pants down. He was bigger than Krauss expected, he admitted. Maybe agreeing with that was a bad idea for multiple reasons.

But Krauss still wanted to touch Allen, he craved it. So, he gave the blonde boy’s cock a few pumps and then started to use his mouth. He was way more experienced due to his immortal status, Krauss was with multiple men during his eternal life. Men he watched to age and die.

“Teacher Krauss, are you ok?” Allen touched the teacher’s black hair. “You’re looking like a statue! Is my dick bad?”

“No, of course not!” he pulled away to reply. “Sorry, I was just overthinking.”

Krauss took a deep breath and started to suck Allen’s cock again. This time, he would allow himself to savor it properly. He needed to feel the shape, girth, every single vein it had, the intoxicating smell and flavor of it, Allen’s delicious moans… Hell, he wanted it for so long. This time, he got lost into his thoughts for another reason.

“Okay, I think it’s time for us to do the thing!” Allen was excited and he carefully pushed Krauss away from his cock. “Please show me how!”

“I-I suppose you want to be the one on top, correct?” Krauss sighed, but it’s not like he actually wanted to top. In every single one of his past relationships, he preferred to receive anyway. “Come here, we need something to use as lubricant. Differently from a vagina, an anus can’t self-lubricate.”

“Can’t we just use spit?” Allen tilted his head.

“Gross” Krauss rolled his eyes. “I have a vial with oil somewhere, wait a minute.”

The teacher reached for his case and looked through a pile of papers until he finally found the small glass container. He then opened it and spilled some oil over his own fingers, later spreading his legs and starting to touch his own hole.

“I’m feeling embarrassed by you staring like this” Krauss was blushing while he fingered himself, trying to hold his moans. For so many nights he did that thinking about Allen, but having Allen to actually watch him doing it felt so obscene.

“Can I try it too?” Allen got closer. “I need to learn!”

“Fine, give me your hand” Krauss grabbed the vial again and spilled it over Allen’s fingers this time and guided his hand. ”Always be gentle. You’ll want to touch it from the outside first.”

Still holding Allen’s hand, Krauss moved it in a way that caused his fingers to do circular movements around his hole. Allen watched with attention, while Krauss left some discreet moans slip out of his lips.

“Now, try inserting a single finger. Slowly” he advised and Allen complied, carefully pushing his index in. Krauss whined in response. “You can start moving a bit.”

Allen once again followed his order, pushing his finger in and out.

“Good boy” Krauss praised, his breath shaking. “Now, you can add a second finger. Carefully.” Allen pushed the second finger in and Krauss moaned louder. “Fuck… Okay, you can try curling them up a bit while you move.”

“Like this?” the boy complied and Krauss almost screamed when he felt Allen reach that spot.

“Fuck yes, Allen. Right there!” he whined, pushing himself on his student’s fingers. Allen never thought he would ever see his teacher being that slutty.

After some time, Krauss removed Allen’s fingers from inside him and grabbed the flask with oil again.

“Now you need to lube your cock” he spilled it over the boy’s erection and gave it a few pumps. “You need everything to be very slippery so it can be comfortable. Are you ready?”

“Of course I am!” Allen sounded all excited.

“Then, come here” Krauss pulled him closer and lined Allen’s cock with his hole, his body trembling at the feeling. “Now you will push, gently.”

Allen obliged and it slipped in easier than he thought, the teacher’s insides basically sucking him in with how aroused the man was. Krauss moaned, clawing at the boy’s back.

“Fuck, you’re so big, Allen…  You are perfect” he murmured, his breath making his glasses foggy. “Please, you can move now…”

Allen started to thrust, causing Krauss to moan even louder. The teacher bit his sleeve again, there was no way he could keep himself quiet when Allen, his Allen, was inside him. He didn’t know if he was feeling that sensitive for spending years without being touched or it was because it was Allen touching him. Probably a mix of both.

“Don’t stop, Allen, please!” he pleaded, eyes rolling back with pleasure. Every single thrust felt like fire was consuming him from inside, hell, it felt like he was reaching the starts. Maybe that was Allen referred to. It wasn’t some cocoon hallucination nonsense, he could feel it himself.

It didn’t take too long for Krauss to climax, his cum sticking to his and Allen’s stomachs. Allen kept thrusting, it was becoming impossible to not cum as well with the way Krauss was squeezing him.

“T-teacher Krauss, I’m going to come!” he panted, thrusting harder into his teacher.

“Please do, come inside me. I’m yours, Allen!” Krauss moaned loud again, pressing their foreheads together. “Please fill me up!”

With a final thrust from Allen, Krauss could feel his cock pulsating inside him. In all the centuries he spent alive, he felt nothing like that before. No man could ever compare to Allen. He was fighting so hard to not bite down on Allen’s neck right now and make him immortal. He wanted him to be his forever. But still, he wanted to hear it from Allen himself.

When they both finished, Allen pulled out, white and warm cum dripping out of the teacher’s hole. Krauss instinctively collected the cum with his fingers and pushed it inside again, he couldn’t waste a single drop of it.

“You’re amazing, teacher Krauss! Thank you for showing me!” He smiled, face all wet with sweat.

“I’m always glad to help you, Allen” Krauss had his breath still heavy. “I have more to teach you, so please don’t hesitate to ask.”

“Of course!” The boy finished to get into his pants. “You’re the best teacher, after all!”

Krauss smiled and closed his eyes. He wanted that moment to last forever.

Notes:

I hope you like it! This ship is so underrated, so I hope this fic helps any other Allen/Krauss enthusiasts out there. See you later!