When Kouichi arrives at his new school, he immediately senses something frightening in the atmosphere of his new class, something that no student wants to talk about and that seems to be related to a mysterious and silent girl.
Kouichi Sakakibara finds himself in a cursed middle school class, Class 3-3, where students mysteriously die in a series of accidents. He becomes close to the mysterious Mei Misaki, who he is the only one to see, and they work together to uncover the secret behind the curse before the body count rises any further. The season explores the origins of the curse and the strange countermeasures Class 3-3 takes, leading to a deadly conclusion.