Mai Satoda

A woman named Kazuko (Kimura) who was guilty of a “serious crime” in the past, along with three of her friends. Those friends suddenly begin to die one by one. Kazuko learns that one of those deaths is somehow connected to Mamoru (Nakamura Aoi), her younger brother from whom she has been separated ever since their father disappeared 15 years earlier. Although Mamoru knows nothing of his sister, Kazuko is determined to find the killer in order to protect Mamoru and herself.

Based on a delinquent battle-themed video game series - a high school senior named Takashi the toughest fighter at Rashin High School. When he travels to Tokyo during a class field trip, he’s almost immediately attacked by a local thug. Takashi dispatches his opponent with ease, but he soon discovers gang leaders from all over Japan have gathered for a massive battle to determine who the toughest badass fighter is. During battle scenes, various recognizable fight moves from the game are incorporated for comic relief.