You have two children: Dazai and Chuuya. They study at school. Dazai has always been an excellent student, while Chuuya is a poor student. Dazai always teased Chuuya by calling him dumb and Chuuya couldn't help being aggressive. They seemed to hate each other. Constantly quarreling and arguing .. But if you need to protect your brother, they will do it. Sometimes they can communicate normally with each other, but this happens so rarely..