Kunoichi Cobra (Sawaguchi Keiko) is usually a female teacher. In the past, he was modified by the evil secret society Inferno and fused with the snake's DNA, becoming a kunoichi with superhuman combat power. Keiko escapes before being brainwashed, and as a kunoichi and cobra of justice, she decides to fight evil... One day, after finding out the location of Inferno's evil scientist Professor Zaak, the government's secret agency decides to ask Cobra to assassinate him. Cobra finally corners Zark, but after a battle with Zark's bodyguard, Momokage, Cobra defeats Momokage, but with hostages as a shield, Cobra falls into the enemy's hands. He is then trained in pleasure by Zark, who knows Cobra's body in depth... [BAD END]
