Exotic dancer Angel is a naturalized Japanese citizen working in the bustling red-light district of Shinjuku, living the good life. It's only when he begins to have uncontrollable sexual urges and having a series of nightmares, and nightly break-ins that he begins to worry for his sanity.

He meets a mysterious man who tells him his true nature--he is an incubus, destined to collect a human’s “life essence” through unconventional means. The man shows him into the Dream World, a place where outcast incubi and succubi have sex with humans in their dreams.