Chikatetsu renzoku reipu: Seifuku-gari

Two sisters are raped on the morning commute on their way to school on the subway in full view of the passengers by a bunch of chinpira. One sister commits suicide so the other quits school picks up a yakuza boy friend who teaches her how to shoot, The boyfriend is killed by his old gang and the girl becomes a cab driver hunting the chinpira who raped her and her sister.