The evil empire Galua has developed a new weapon: the Anti-Gaia Particle Ray Gun, the "Gaia Killer Gun." During battle, Gaia Yellow, Mizuho Rika, realizes that Gaia Pink, Hikino Kei, is the target and sacrifices herself to protect her. Unable to accept Rika's death, Kei resolves to take revenge alone. However, the evil empire Galua exploits her personality, launching even more brutal tactics. Female commander Pharaohna uses the Gaia Killer Whip to torment Gaia Pink. Kei's powered suit is destroyed, and she is tortured to extract the secrets of Gaia Man. Enduring intense pain and humiliation, she refuses to surrender. A gripping story unfolds, driven by her unbreakable will and fierce determination for revenge.