Kurogane Taito continues to have a recurring dream. A 6-year-old Taito sees a girl who he cannot remember while they sit together in the playground. She tells him that she will give him her poison and afterwards they will always be together, enticing him when he becomes frightened with comforting words. After biting him and giving him her poison, the girl confesses her love to him and encourages him to tell her he loves her as well, thus sealing the curse...