Sumo Do, Sumo Don't plot
Ryota Moriyama, a senior at Kyoritsu University, is offered a job at a top company, only to be dumped by Saki Nishino. His professor says he can graduate if he joins the sumo wrestling club and competes in at least one match. The club is dying with only one member for two years, Honoka Oba. In order to graduate, Ryota undergoes Honoka's strict training method and begins recruiting other members.