No one in class 3-3 will acknowledge Mei Misaki. When transfer student Kouichi Sakakibara joins them at Yomiyama North Junior High after illness keeps him away for the first month, he recognizes the reserved girl with an eyepatch from a hospital encounter. His classmates warn him against approaching someone they insist does not exist, but he befriends her anyway.
Their fear is tied to a curse on the class and rumors about a former student, though no one will give Kouichi a complete account of what happened. Seeking to understand Mei's connection to the curse, he begins investigating. A succession of tragedies makes that search increasingly urgent, leaving Kouichi, Mei, and their classmates to uncover the truth at a heavy cost.
