Project Arms

Ryo Takatsuki discovers that his missing right arm is no ordinary prosthetic-it's an ARMS nanomachine implant, the result of secret genetic experiments. Teaming up with other test subjects-Kei Karuma, Takeshi Tomoe, and Hayato Shingu-he fights against the shadowy organization behind the technology, the Egrigori, to save his kidnapped girlfriend, Katsumi Akagi.