Kouhei Hasekura joins the Shuchikan Academy in his second year. This prestigious public school for junior high and high school students offers six years of English-style education. However, the campus is situated on Tamatsu Island, accessible only by boat from mainland Japan. Even though the setting seems peaceful, there is a dark reality hidden from plain sight - some of the students are vampires! As Kouhei investigates the mysteries surrounding the school and the girls who attend it, he becomes embroiled in their malevolent secrets without realizing it.
