Whispering Corridors 2: Memento Mori (1999)

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Min Ah discovers a scarlet-covered diary as she is hurrying to school. She has a brief hallucinatory experience when she opens it, initiating a series of strange occurrences which eventually draw Min Ah into the eerie world of the diary. In her desire to find out more about the diary, Min Ah feigns an illness, getting permission to lie down in the school's clinic. There she witnesses the reunion of Hyo Shin and Shi Eun. The day in the girls' high school is half over, and the students are preoccupied with the trauma of getting their physical checkups. Suddenly their hustle and bustle are abruptly interrupted by a sharp scream which announces the death of Hyo Shin. Soon, her ghostly entity will linger over everyone's secret.