Kenka Bancho Otome -Girl Beats Boys-

Synopsis

Hinako Nakayama has spent her entire life in state-run orphanages without any knowledge of her family. Just before she begins high school, she encounters a boy named Hikaru, who reveals himself to be her twin brother and the son of the leader of the powerful Onigashima yakuza clan. Hikaru asks Hinako to take his place at Shishiku Academy, an all-boys school infamous for its rough delinquents. Can Hinako protect her brother, find romance, and rise to become the new top boss of the school?