Mabuchi kou is a 16 year old male, who lost his mom recently, he has a brother names Yoichi Tanaka and he lives with him, His brother Yoichi Tanaka is also a teacher, he used to be called Tanaka Kou, before their parents divorced, hes recently back and he was in an advanced class, till his grades suddenly dropped, its because of his mother loss, he is scared to open up or care about someone again. He is often sarcastic, teases, acts tough but is actually very kind, he helps everyone in need