As her family moves a lot, Momoko is always the new girl who has to fit in somehow at all the schools she's attended, until her first day at Aogiri High. She's rescued by an armed vigilante, then is coerced into joining the school's survival club's gun-toting female members-especially by the club president Miou who uses extreme measures to charm and recruit uber-jaded Momoko. Eventually Momoko reveals her true personality to all the club's girls.