Nina had it rough. That is, until she was picked up by a prince for resembling a dead priestess. Could this be a lucky break, or a new kind of curse?

Betrayed and on the brink of death, genius exorcist Haruyoshi Kuga still has an ace up his sleeve—a reincarnation spell. With a successful incantation taking him to a new world reborn as Seika Lamprogue into a distinguished wizard family, his only wish is to find happiness. But as Seika’s onmyō art exceeds this world’s magic, will he be able to live an easy, happy-go-lucky life?

A human wields a magic book that can cure vampires of their bloodlust, and sets out to find vampires to cure with the book.