Morioka Kouhei dreams of becoming a photographer, yet he finds that he unintentionally captures ghosts on his film. While exploring an old German castle, he encounters Hazuki, a vampire girl who is imprisoned there against her will. Hazuki attempts to turn Kouhei into her slave by draining his blood, hoping he will break the device sealing her confinement. Although Kouhei resists the vampire’s curse, he eventually ends up aiding her. Hazuki escapes the castle and travels to Japan to search for her mother. Upon arrival, she stays at Kouhei’s house, where he lives with his grandfather, who agrees to…