Punch Rush JK Tara-chan

Katsuo Nikaido, known as the "Fist King," is considered the strongest and undefeated delinquent in Japan. Few are aware that the real fighter is not Katsuo, but his sister, Tabara Nikaido. She has taken her brother's identity and secretly engaged in combat, overcoming all opponents who challenged her. The story follows this high school girl who continues to fight under a borrowed name.