[2] Yakuza boss Tosa (Takeshi Caesar) abandons his girlfriend Yukari in order to kill a rival named Masashirenbo but fails to finish the job and is sent to prison for seven years.

Upon his release, he is welcomed back by aspiring yakuza Kensuke Hagane (Tsuyoshi Ujiki), who idolizes Tosa and has been holding his wallet all this time.

Kensuke, who can now only consume metal for energy, leaves the scientist to seek revenge on the people who killed Tosa as Hiraga remotely monitors the battle capabilities of his cyborg creation, whom he nicknames "Lead", though a laptop computer.

At a driving range he finds the duplicitous gang members who led him and Tosa to be killed and forces the underboss Maeda to give up the name of the killer, Kamane Haga.

Yukari eventually leaves him because she will not be able to forget Tosa while looking at his rising koi tattoo on Hagane's back, then she attacks Saratake while posing as a caddie on a golf course but is stopped by Taka.

Saratake and Fuku decide to find the doctor who built Hagane in order to gain more robot soldiers to fight against their rival Nishida.