As most students have no interest in Sumo Hinomaru decides to tempt potential members with Chankonabe, but this only attracts Chihiro Kunisaki, a mixed martial arts wrestler. While Chihiro has no interest in Sumo he and Hinomaru bond over their drive to become champions and invites Hinomaru to his exhibition fight. Reina Gojo, Yuma's sister and Student Council President, develops a grudge against Hinomaru for defeating her brother...