Machine Girl Collection

Shy Japanese school girl Yoshie survives a near fatal blow to the head. After undergoing extensive training and receiving a few modifications to her body, Yoshie decides to get revenge on the heinous criminals who murdered her friend Ami and left her for dead.

Ami is a typical college girl. She's bright, friendly, popular and athletic, with nothing to set her apart from other girls her age other than the fact that she is an orphan, left to care for her younger brother after her father committed suicide after being falsely accused of murder. But while there is tragedy in their past, the siblings' future looks good, except for one thing. Ami's brother has racked up a considerable debt to another boy at school, and that boy just happens to be the heir to a clan of vicious ninja-yakuza. Ami's brother can't pay, violence breaks out and in the course of trying to avenge her brother, Ami is captured by the clan. They torture her and hack her arm right off. Ami escapes, barely alive, and is taken in by the owners of a machine shop who build her a customized, bullet-spewing arm. From that point, the quest for revenge is on in earnest.

Living in the lawless Ishinari District in a future Japan, sisters Ami (Hina Nagimiya) and Yoshie (Hanakage Kanon) who sold their bodies to help their parents, try to earn a living performing as an idol group in the area. When their performance causes stranger Matsukata (Tak Sakaguchi) a notorious hitman, to notice their condition, the three realize their worth to each other in the fight against Aoyama Dharma (Kimono Negishi), the female boss of a notorious organ harvesting ring in the area. Realizing that even their skills are no match for her army of goons and henchmen, the two are outfitted with special homemade weaponry to their bodies and become the ultimate killers.