Corpse Party Cemetery 0: Kaibyaku no Ars Moriendi

There is a website for suicides appearing on the internet only at midnight and when certain specific keywords are searched. Although it is supposed to be only a mere urban myth, girls who have performed the ritual suddenly disappeared. High school paranormalist Naho Saenoki launches an investigation to shed light on this gruesome incident while the amount of victims keeps increasing. And then, it happened to Naho herself...