Kiriko

A group of adults is invited to a high school reunion following the death of their former classmate, Kiriko. Ryosuke, a man with short black hair who knew Kiriko, receives a letter signed "From K." He begins to investigate the identity of "K" and the circumstances surrounding Kiriko's death. As he struggles to recall the past, other classmates start dying in shocking ways. Gradually, he comes to understand the truth about Kiriko and the danger he is in.