Ep. 1: Hiro sacrifices himself to save Hime, who revives him as her immortal servant.

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Hiro Hiyorimi wanders into a shopping district while believing he is lost near his sister's mansion. He saves a mysterious girl from falling construction beams, dying in the process. The girl, identified as Hime, revives him in a hospital bed. Hiro returns to the mansion to find Hime surrounded by werewolves led by Lobo Wildman. With Hiro's help, Hime kills Wildman. Because Hime granted Hiro immortal life, he is now bound to serve her forever. This sequence establishes their master-servant relationship and Hiro's new eternal existence following his selfless act to protect the girl he saved.