In the halls of a high school girls' dormitory there are no rules and anything goes. A beautiful girl named Kurihashi Minami transfers to the all-girls high school Gokurakuin ("Gokujo") from Los Angeles, and she plans to rule Gokujo with her cuteness as her weapon. However, a girl named Akabane Aya confounds Minami's plans on her first day there, and Minami has to deal with…