Eri, a vampire woman, blends into human society and lives her life. In her life with humans, she is losing her emotions. In a certain town, a series of murders occur. On TV, Saionji Misono, a woman who calls herself a vampire, says, "It must be the work of my people," causing a sensation among the public. Yuri Saeki, the head of the occult research club, and her friends start their own investigation to find out the truth. By chance, they meet Junpei Sasamoto, a bottom-feeding reporter who wrote the occult article, and his assistant Momoka Yoshida, a dispatched woman, and decide to investigate together.