Takadagawa High School's sumo club is in danger of survival due to a lack of members. Hiromi Katabu, a second-year student, hears that Sekiwake Nisei is joining the rival Kabutoyama Technical High School sumo club, and orders her two juniors to bring Ozeki 's son. The new student who was brought in eventually has a mysterious appearance with a topknot, and the seniors believe that he is "Ozeki Nisei".