It has been 50 years since the discovery of the Vistamps, mysterious stamps that can separate the devil in one's own body by contracting with them! Deadmans, a demon-worshiping organization, appeals to its followers to release the demons in their bodies in an attempt to revive their Master Gifu, the mummy found within their ruins... At Fenix, a government agency organized to protect the peace from the Deadmans, researcher George Karizaki begins to develop the Revice System! Despite all this, eldest son Ikki Igarashi is busy working over at his family-owned public bath, Happy Spa! Although he takes care of regular customers, he is being afflicted by a runaway devil that only he can see. It's an important day when his younger brother Daiji gets appointed as the captain of Fenix... however not everything goes as planned when an unexpected event occurs at his brother's graduation! So then now, alongside the devil only you can see...!