The Seventh Reader

In the beautiful university campus, bizarre cases occurred one after another, but the seemingly unrelated murders revealed an incredible smell of death. The once cheerful campus life was suddenly silent, and Fang Mu's beautiful first love was also permanently sealed. Fang Mu found the "death library card" by chance. The murderer is around. Who is he? Can Fang Mu stop him? The seventh reader, how will it affect the life of Fang Mu...?