Ep. 1: Caiman battles sorcerers in The Hole while seeking the one who transformed him.

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Caiman, a large man with a spiked lizard-like head, and his friend Nikaido fight two sorcerers in The Hole. Caiman kills one sorcerer after proving his immunity to magic, while Nikaido breaks the finger of the second, Fujita, who escapes through a magic door. Caiman and Nikaido return home, where Nikaido recalls being transformed by an unidentified sorcerer, though his memory is otherwise blank. Caiman has been shoving sorcerers into his mouth to find a hidden head that identifies him; if it says "you are not the one," he kills them. He hopes killing the original sorcerer will restore his human head. After working at a hospital for sorcerer victims, Caiman saves Nikaido from a rookie sorcerer transforming him into an insect. The next day, they photograph Caiman's mouth for clues when another magic door appears. Caiman attacks a female sorcerer, Ebisu, but Fujita drags her back before she can reveal what she saw. Ebisu escapes but loses her face. That night, Caiman has a nightmare about the person in his mouth, while Cleaners attack enemies.