Watari Goro, a college student, saves Satoko and Katsumi from the Neo-Human Empire's Fantom Army. The youngsters bring him to the base of the Youth League, a group of pure-hearted young mutants with psionic powers. Their leader, Capt. Sarra, awakens Goro to his own super powers that allow him to turn first into Sanagiman, then into Inazuman. After he defeats Neo-Human Quintuple Bambara, Goro is accepted into the Youth League, and he is presented with the amazing vehicle, Raijingo.