Ryouta hates girls over everything. He won't touch anything touched by a girl before. He's really good at fighting and seems to be happy doing it but he's never been seen punching a girl.
He goes to a boarding school and shares a room with his friends: Mina and Shiro.
He has three older sisters: Karin, Chouko, and Fuuka. He seems to kind of like them since he promised them to come home over summer break for them but later argues with them about them saying something like venting their anger on him.