Taro Yamada lives in the town of Corja in Japan with his mother, eccentric father and younger sister Alyssa; the family moved there after his father changed jobs. He received his Combat Armor by accident during their house-warming party, when he ordered pizza from 'Sensational Cafeteria' or SECA and instead received the Rent-A-Hero suit. After realizing the suit gave him incredible strength and that he is required to pay for the armor, Taro decides to become a hero for hire, performing various heroic tasks and odd-jobs for the townspeople of Corja.