Shiratsuyu no Kai

A group of students gathers at an old shrine for a night of ghost stories—one hundred tales told one after another in the dark. When the hundredth ends, they find a hidden door. At the bottom of an underground passage, a legend takes form: a guardian deity, a forgotten ritual, a sacrifice. The marks appear on one of the girls' bodies, and the deity comes calling once more. The blood knew before she did.