Touya moving out to live with Keigo and all of his siblings are,...

They don’t want their big brother leaving home to go so far!
So they do everything in their power to convince Touya to stay with them… and more importantly, for Keigo to leave.
“I can’t?” Keigo tilts his head.
“No!” Fuyumi and Shoto parrot.
“Oh well,” Keigo scratches his chin, contemplating. “It’s not like any of you can stop me, now can you?”
“He was our big brother first!” Fuyumi cries.
“And now he’s my boyfriend.” Keigo smiles smugly. “Although, one day, I could very well be your brother in law. How’s that sound?”
Keigo frowns, leaning down to the youngest eye level.
“What if I share?” Keigo says. “He’ll visit frequently and we’ll live close by, so you all can visit. I’ll even give you a spare key to our place.”
“You promise?” Fuyumi asks. “He’ll still be around?”
“Of course!”
“He’ll come to all my sport matches just like before?” Natsuo demands.
“I’m sure he wouldn’t dare dream of missing one.”
“If that’s what he was doing before, then yeah, I’m sure he’ll supervise you, kid.”
Now the Todoroki’s siblings whisper amongst each other, loud enough for Keigo to hear but he pretends he can’t until they disperse.
Keigo smiles softly. “I promise. Cross my heart.”
He successfully wins over the siblings enough, exiting the room to find Touya out in the hallway.
Of course he was listening in the entire time.
Keigo pecks Touya’s cheek. “Like you?”
“Stop it, you know what I meant.” Touya pouts, almost too cute for Keigo to resist another kiss. “And don’t be mean to them.”
“They were being mean first.”
“You, me,” Keigo grins, “And the three kids that will have a spare key to our apartment.”
Touya chuckles as if it’s a joke. “Stop messing around, Kei. You can’t be serious.”
“You’re not serious, right?” Touya’s expression flattens. “… Right?”
While the Todoroki’s siblings couldn’t get Touya to stay or Keigo to leave;
They now could enter the new beginnings of their changed family.