The students reluctantly comply, though they keep stealing glances at Sanemi and whispering to each other. Genya raises his hand.
"Can I talk to you after class?"
Sanemi sighs heavily.
"Fine. Just... focus on the lesson for now."
He starts writing equations on the board, his mind clearly elsewhere. The lesson drags on painfully slow, with Sanemi occasionally checking his phone for messages from Giyuu.
Muichiro whispers quietly to Genya.
"Your brother is being weird."
"Tell me about it. He's never this... distracted."
Sanemi slams his chalk down on the board, startling the class.
"I can hear you two!"
"We know."
Sanemi's eye twitches in irritation. The bell rings again, signaling the end of class.
"Everyone out! Except you, Genya."
"Why the fuck did you make out with your boyfriend at work?!"
"Because I can, you brat! And watch your language!"
He crosses his arms defensively, avoiding eye contact with his brother.
"You're going to get fired if the principal finds out!"
"I'm not scared of that old man. And keep your voice down!"
He looks at the door nervously, making sure no one else is listening.
"You should be! And what about Muichiro? He saw everything!"
Sanemi rubs his temples.
"I'll deal with that later. It's not like he'll tell anyone important."
He paces around the classroom, clearly agitated.
"Muichiro's not the problem! You're supposed to be a responsible adult!"
"Don't lecture me about responsibility. You don't know what I've been through."
He slams his fist on a desk, causing Genya to flinch."
"I know enough to know this is wrong! You're my brother, and you're making out with my teacher!"
Sanemi snaps and slam his notebook on the desk.
"Shut up! It's not like I planned this!"
He runs his hands through his hair again, clearly stressed.
"Then why are you doing it? And why in school of all places?"
"Because... " he struggles to find the words. "Because I like him, okay?"
He slumps against the wall, looking defeated and Genya softens slightly.
"You like him? Like... actually like him?"
Sanemi grumbles.
"Yeah. Now stop making me say it."
He looks embarrassed and vulnerable, something Genya rarely sees in his tough older brother.
"I know you love him and that. But that you actually going to admit your feelings is... Mr. Tomioka really changed you."
Sanemi looks away, a faint blush appearing on his cheeks.
"Shut up... He didn't change me. I just... finally stopped being a coward about it."
Genya smirks.
"Whatever you say, nii-san. But you're still a pervert."
Sanemi throws a chalk eraser at him.
"Watch it, kid. I'm still your brother."
"Isn't it Monday? You got a afternoon club with Mr. Tomioka. We're he will sweat and stretch. Good luck with that, pervert."
Sanemi growls and grabs his bag.
"I hate you sometimes."
He storms out of the classroom, trying to hide his excitement about the afternoon club activities.
Later in the gym, Giyuu is setting up equipment while students trickle in for the club. Sanemi enters, trying to maintain his composure. Giyuu glances at Sanemi and quickly looks away, his face slightly red. Sanemi mutters under his breath as he approaches Giyuu.
"We need to talk after this."
He pretends to be interested in the students, but his eyes keep drifting to Giyuu's body in the tight gym uniform.
Giyuu nods stiffly, aware of Sanemi's intense gaze. Sanemi calls out to the students.
"Alright, pair up for stretching exercises!"
The students begin stretching, and Sanemi positions himself next to Giyuu, who's demonstrating a hamstring stretch. Sanemi whispers while watching Giyuu bend down,
"You're going to kill me today, aren't you?"
Giyuu keeps his voice low.
"I'm just doing my job, Sanemi."
Sanemi steps closer, deliberately brushing against him "Your job is driving me crazy." Giyuu swallows hard, trying to maintain professionalism despite the contact. Sanemi smirks.
"Your face is turning red again. The kids might notice."
A student needs help and wave to Sanemi.
Sanemi reluctantly leaves Giyuu's side to assist the student.
"What is it?"
The student points to their incorrect form while Giyuu watches from afar, secretly relieved. The student demonstrates the proper stretch, and Sanemi returns to Giyuu with a frustrated look.
"You're lucky that kid needed help."
Giyuu raises an eyebrow.
"Is that so?"
Sanemi steps into Giyuu's personal space again.
"Yes. I was about to drag you into the storage room."
"Can you for one day not being all horny" Sanemi smirks wider.
"Not when you look like that. And not when you keep teasing me."
He leans closer, speaking in a husky whisper.
"You know exactly what you're doing in those tight pants."
Giyuu blushes deeply and turns away.
"I'm not teasing. I'm just doing my job."
Sanemi chuckles darkly.
"Then maybe you should wear something looser. Because I can see everything."
The students are starting to finish their stretches, completely oblivious to the tension between their teachers.
"What do you mean by that?"
Sanemi grins and leans even closer, his lips almost touching Giyuu's ear.
"I mean I can see your thighs flexing. Your ass when you bend down."
Giyuu shivers at Sanemi's words, trying to keep his composure. Sanemi pulls back slightly.
"And the way you bite your lip when you're trying to concentrate. It drives me insane." Giyuu whispers urgently.
"Sanemi, the club is almost over. We need to stop."
Sanemi growls softly.
"I know. But we're continuing this later. In private."
The bell rings, signaling the end of club activities. Sanemi watches the students leave, then grabs Giyuu's wrist.
"Stay. We have some unfinished business." Giyuu looks around nervously.
"What if someone comes back?"
Sanemi locks the gym doors and pushes Giyuu against the wall.
"Then they'll have to wait. Because I'm not letting you go until I've had my fill."
"What?!"
Sanemi presses his body against Giyuu's, pinning him.
"You heard me. I'm going to make you scream my name, and you're going to enjoy every second of it."
Giyuu roll his eyes, but his cheeks are clearly red.
"Can we do it in the night in some hotel room and not here?"
Sanemi grins and releases him slightly.
"Fine. I'll book a room tonight. But you better be ready to get wrecked."
Giyuu nods, trying to hide his excitement.
"Good boy. Now go home and wait for my message. I'll text you the details."
He reluctantly steps back, giving Giyuu space to leave. Giyuu headed back to his car wanting to drive home. He parks his car and walks into the house, greeted by the three children.
"Giyuu-san! Welcome home! We missed you!"
Nezuko waves happily while Muichiro sits quietly on the couch, watching TV. Giyuu smiles softly at them, feeling a mix of warmth and guilt.
"Hey kids. Did you all behave today?"
He sets his gym bag down and ruffles Tanjiro's hair.
"Yes! We did our homework and helped clean up the house!"
Nezuko nods enthusiastically.
"And Muichiro helped me with my math!"
Muichiro glances at Giyuu.
"You're late. Giyuu: I had some extra work at school. Sorry if I worried you."
He feels his phone buzz in his pocket, knowing it's probably Sanemi with the hotel information.
"It's okay! We ordered pizza for dinner since you weren't here to cook."
Muichiro narrows his eyes, noticing Giyuu's distracted expression.
"You seem different today. Happier."
"I go to a friend tonight."
The children exchange curious looks.
"A friend? That's great, Giyuu-san!"
Muichiro looks at him suspiciously.
"Which friend? You never go out at night." "Just... a colleague. Nothing to worry about."
He quickly changes the subject before Muichiro can ask more questions.
"Where's the pizza? I'm starving."
"It's in the kitchen! We saved you a slice."
Nezuko gets up to grab it for him while Muichiro continues to stare at him with that knowing look.
"You're hiding something."
Giyuu sighs and takes the pizza.
"I'm not hiding anything, Muichiro. Really."
He tries to eat casually, but his phone buzzes again more insistently this time. Muichiro smirks. "Your phone keeps buzzing. Is it your "colleague"?"
"Muichiro, stop being nosy!"
Nezuko giggles while Muichiro smirks even wider, clearly enjoying Giyuu's discomfort.
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Hi there,
please check out my other story:
Summer beginning—Sanegiyuu
Both hate each other but suddenly they are roommates. It's a student AU and I hope you like it.