Hinako Nakayama is an orphan and a martial arts expert, who was living her life in a fuzzy haze when she finds herself attending a new school. While the new outlook she gets from her new surroundings is great, there's a few problems: 1) It is an all-boys school 2) Its student body is nearly 100% punks who are ready to brawl at a moment's notice and 3) She is attending under an assumed identity that ensures the toughest are all going to be gunning for her!