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It started off innocently enough, Shouto mused as he watched the scenery go past the window of the bus.
Ashido had taken a picture of him when he wasn’t paying attention, too busy playing with his flames, while class 1-A was all sitting outside one night. She had shown it to Kaminari and Jirou, who had both burst out laughing when Sero had pointed out that it looked like the flames said the word ‘Dick’.
Yaoyorozu had reprimanded them for being vulgar as she passed, but it had given him an idea. One that would not go away, but instead could be used to devastating effect.
A couple of weeks (and a lot of singed hair and burnt clothes) later, he’d managed to get the hang of it.
Just in time for their class’s allotted weekend trip home.
It was quiet, he noticed as he opened the front door. After taking off his shoes, he gently padded over to the kitchen where Fuyumi was probably making dinner.
Turning the corner, he spotted her dancing around the kitchen, bowl of something cream coloured under one arm and a whisk-turned-microphone in her other hand.
He stood there for a moment, gently smiling to himself and enjoying the happy aura she was exuding (for once, such a rare occurrence in their home that it could mean only one thing) until she spotted him out of the corner of her eye and nearly dropped both bowl and whisk in her surprise.
“Shouto! I wasn’t expecting- That was this weekend?” She put the bowl down on the counter before she could attempt to drop it again.
“Uhm, Father’s out of town for most of the weekend, but I think he’ll be back before you leave for Yuei again” He could hear the unspoken ‘Unfortunately’.
They both know all too well the kind of person their father is.
He nodded (mostly to himself) “Excellent. It’ll give me a chance to polish this technique up a little more before I show it to him”
Fuyumi’s jaw dropped. “You want to show him a technique!? Who are you and what have you done with my little brother?”
That coaxed out a little chuckle from him, which only served to make her squint her eyes in suspicion.
“I am myself, and I am fine. You’ll see what I have planned soon enough and then you’ll understand, I promise.” And with that, he left to go to his room.
To Shouto’s infinite luck, Endeavour didn’t return home until he was leaving to return to the dorms.
And, for once in his life, he’d enjoyed being at home. He’d filled Fuyumi in on all the shenanigans his class had gotten up to, as well as the different kinds of training he’d been doing (She was far more interested in the former than the latter, excited to hear about her little brother’s friends.) and he’d even managed to have civil conversations with his brothers.
Shouto was about to make a brilliant weekend at home absolutely fantastic AND piss off his father. If he were one of his classmates, he’d probably be vibrating with excitement.
As it was, he simply smiled at his father and welcomed him home.
“Father, I would like to inform you before I leave that have spent a significant portion of my spare time learning to control my flames better.”
“Excellent Shouto! Finally coming around to my way of thinking” Endeavour positively beamed, and it took all of Shouto’s self-control not to punch him and wipe that smug grin off his face.
What he had prepared was a hundred times better than that.
“Allow me to demonstrate”
He heard Fuyumi suppress a giggle and move away from the doorway as Endeavour stood there, frozen with his eyes nearly bursting out of his skull.
Through some miracle, Shouto managed to keep a straight face as he pulled out his phone, snapped a picture of his father’s face before grabbing his suitcase and all but sprinting to the bus where his class his friends were waiting.