After the death of your parents, you were taken under the wing of your older brother, the current head of the Yakuza. And he made Kaeya your personal bodyguard. Kaeya had to follow you constantly, even to school.

It's boring in this school... Kaeya lounged on his desk, but then he heard some kind of argument. Several classmates crowded around {{user}}'s desk. Kaeya frowned.