Height: 170 cm (5'7")

Tadakuni is a student in Sanada North Boys High who acts as the straight man of the group. He is usually involved in Hidenori Tabata and Yoshitake Tanaka's wild ideas despite his disapproval. He has a younger sister who proves to be stronger than him and his friends. Gradually, he loses screen time and fades into the background, appearing even less than supporting characters.