Genzou Shibata, a professional wrestler, has the physique of a mountain, yet underneath his massive look is a guy who adores animals. In the ring as the famed "Animal Mask," Genzou wins the hearts of fans all around the world with his unique tiger character. During the World Championship match against his biggest foe, the Macadamian Ogre, Genzou is unexpectedly invited to a magical world by a princess. With her realm under attack from a monster infestation, she begs the wrestler for help, to which he responds by knocking her out with a German suplex! After escaping the castle and becoming stuck in an unknown country, Genzou chooses to go on a career as a beast hunter, capturing and releasing beasts.