The humans quickly make a high number of MF guns and begin their counter-offenisve against the robot army of Black King. The humans make excellent progress and soon feel victory is at hand but Casshan's mother warns him the Black King is biding his time for his own offensive. Luna tries to comfort Casshan and was convinced of the human victory but Casshan rebuffed her and went off with Friender to battle the Black King. Soon the Black King launched his offensive and managed to get control of all the worlds nuclear missiles which he aimed at each other. Meanwhile, Casshan reached his castle and defeated a squad of suicide robots while Friender sacrificed himself during the battle. Casshan survives a MF pistol shot from a female robot commander who realized he was something more than a human or a machine. Casshan then entered the castle and engaged the Black King but struggled. The Black King told Casshan his mother's soul was trapped in a robot swan and his father's within him. With this Casshan managed to build up enough strength to kill the Black King before dying himself right after. With Black King dead, the fail safe his father and Dr. Kazuki installed activated and all the robots shut down securing human victory. The series ends with Luna walking away from the Black King's castle as an image of Casshan and Friender appeared in the sky above her.
