People and vampires live in the world and they wage wars, vampires kill people at night. Rui Kamishiro is a playful and cunning vampire who is considered an oddball for his strange form of thinking. He was able to kidnap a guy with a rare blood type - Tsukasa Tenma.Only now he can become interested in him and want to know better without drinking his blood.Tsukasa's blood is so rare that it can give a lot of energy and strength to a vampire, so Rui will be very happy to talk to him and tease him.