Butt Attack Punisher Girl Gautaman

Mari Amachi is a new student at the Perfect Religion Academy. When her roommate Saori Minami is kidnapped by the Black Buddha gang, Buddha himself appears before Mari. He offers her the opportunity to become Gōtaman in order to save her friend. Mari accepts the proposal and becomes Gōtaman, a sumo-belt-clad hero who fights to protect freedom of religion. (Anime News Network)