Staz, the leader of a section of the demon realm, holds a prominent position as a vampire boss. However, he doesn't have an appetite for human blood, preferring to immerse himself in Japanese culture. When Yanagi Fuyumi, a teenager from Japan, inadvertently arrives in the demon city, Staz sees it as a rare opportunity. Unfortunately, while occupied with the intruder's presence, a monster kills Fuyumi, turning her into a wandering ghost. Filled with regret, Staz promises to find a way to bring her back to life.