Sailor Suit and Machine Gun: Graduation (2016)

Izumi Hoshi (Kanna Hashimoto) is senior in high school, but she led a small yakuza group in her past. After killing her uncle’s murderer with a machine gun, her yakuza group disbanded. Izumi now lives an ordinary life as a high school student and works as a manager at a cafe. A dangerous situation soon awaits for Izumi.