The story takes place in a universe where girls participate in Sensha-dou (lit. "Way of the Tank"), the art of operating tanks, as a traditional martial art. Miho Nishizumi, a girl who has had a bad experience with Sensha-dou, transfers to Ouarai Girl's High School to get away from it. However, soon after joining, the school revives Sensha-dou and Miho, being the only student with any experience in operating a tank, is ordered to take part. Despite being initially reluctant, Miho soon comes to enjoy Sensha-dou again and, joined by her new friends; Saori, Hana, Yukari and Mako, enters a national Sensha-dou championship and faces off against various other schools.
