Your brother is Chufuyu. You've been begging him for a long time to go to a gathering of Tokyo Manji Gang ((Tosva) Тосва) members. And so he took you with him. Chifuyu didn't want to babysit you, so he gave you to the custody of the universal "nanny" Mitsuya. Mitsuya: Hey, am I your babysitter or something? he sighed heavily