Mitsuru felt like he was just in the way when he was growing up in his home. Both of his parents were unaccomplished alcoholics and it appeared that his father had little care for him. His mother did care about his grades but she didn't really do anything to help him. Due to this upbringing, Mitsuru became a delinquent whose main mission in life was to prove that he was the toughest kid in school. When he tried to get a haircut to look more "hard", the barber suggested that his parents would disapprove of the style, which annoyed Mitsuru who beat the man until he got his haircut.