Ryota Moriyama, a senior at Kyoritsu University, receives a job offer but lacks the credits to graduate. His professor tells him that he can graduate on the condition that he joins the sumo club. The only current member is Honoka Oba, a sophomore and top-class sumo wrestler who is reluctant to let Ryota join. Ryota recruits new members, allowing the club to participate in a tournament. Despite the grueling training, Ryota and the others work hard. Meanwhile, Ryota develops feelings for Honoka. In this story about sumo and love, everyone finds themselves in the midst of the unexpected.