Full Metal gokudô: Kensuke Hagane (Tsuyoshi Ujiki) is a beginner in the Yakuza world , he is very fearful and nobody respect him. After the prison release of Tosa (Takeshi Caesar), who is a Yakuza boss and the idol of Hagane, both are killed as a result of a gang problem with Tosa. Both corpses ends in the hands of mad scientific who creates a kind of robot with parts of both corpses. Now Hagane is part machine with some parts of Tosa, he is bullet proof and has an incredible strength. When he escapes from the scientific, he is looking out for revenge with the heart of his boss and idol, literally.