The protagonist Saki, Protecting god in old Shinto shrine. In the appearance of the girl who doesn't change from 1000 years ago, It fought against existence to which the person was surprised. And when there is no threat, It mixed with the person's life and it was alive as a usual schoolgirl.

However, recent the dark rumor comes to flow to the educational institution. When you hear the story, though kind of evil spirits from the mountains and rivers... When proceeding to the educational institution of night for the survey, there is a grotesque monster that had not seen.