Memento Mori (1999) on Netflix

In this second installment of the Whispering Corridors series, a young girl finds a strange diary, capable of arousing hallucinations, kept by two of her senior fellow-students who seem to have an unusually close bond.

Min-Ah finds a strange diary, capable of arousing hallucinations, kept by two of her senior fellow-students, Hyo-Shin and Shi-Eun, who seem to have an unusually close bond. But Hyo-Shin suddenly kills herself, for no obvious reason, and the entire school is shocked and depressed. Min-Ah, however, starts to feel different. It's almost as if she's somehow possessed by the dead girl...

—Anonymous

In a Korean high-school, the teenagers Hyo-Shin Min and Shi-Eun Yoo are lesbian lovers that decide to write a diary together and expose their love to their schoolmates. When Hyo-Shin has one night stand and gets pregnant of a depressed teacher, the love of Shi-Eun dies and she breaks up with Hyo-Shin leading her to commit suicide. Shi-Eun's classmate Min-Ah So finds and reads their diary, disclosing the innermost secrets of the two lovers, and becomes obsessed for Shi-Eun. When a close friend advises that Min-Ah would die because she was reading the diary of a dead girl, she wants to return the diary to Hyo-Shin.

—Claudio Carvalho, Rio de Janeiro, Brazil