Nozomi Kaminashi is a fantastic gymnast, and in order to help her family out of poverty, has decided instead to become a competitor in a new women-only sport, Keijo. A lucrative endeavor, Keijo is a popular gambling sport where female players stand on floating platform on the water and must push other players off by only using breasts and buttocks. Will Nozomi be able to make it big in the world of Keijo?