"Senshadou" is a traditional sport in which tanks from World War II are used in elimination-style bouts. It's widely performed by women and girls both, and it's marketed as a type of art aimed at elevating women in society and making them more desirable to males. Senshadou's prominence grows throughout time, leading to the formation of a global championship, which will soon be contested in Japan. Miho Nishizumi, who hails from a family of well-known senshadou practitioners, is at odds with the sport after a tragic experience caused her to quit and, as a result, a schism between her and her family. To get as far away from the practice as possible, she transfers to Ooarai Girls High School, where the senshadou program has been discontinued.