Kouichi Sakakibara, a transfer student, is back in class 3-3 at Yomiyama North Junior High after missing the first month of school due to illness. He finds himself drawn to Mei Misaki, a quiet girl with an eyepatch he met in the hospital while he was away, among his new classmates. However, none of his classmates recognise her existence, and they caution him against familiarizing oneself with nonexistent things. In spite of their warnings, Kouichi befriends Mei and later discovers the ominous reason for his friends’ concern.
The concerning rumors center on a previous member of class 3-3. But nobody will tell Kouichi the entire truth about the terrible incident. Kouichi becomes engrossed in the curse that afflicts his class and sets out to find out how it relates to his new acquaintance. Kouichi, Mei, and their friends must now solve the spooky mystery as a string of disasters happen all around them, but doing so will cost them dearly.
