Isazuki Village is a village with a deep, strong faith in the Inugami folklore. As the opinions of redevelopment of the village are divided among the villagers, they are greeted with the strange deaths of the people from a construction company who had come to investigate the village. Tachibana Tsukiko, who lives in this village, and her three childhood friends are getting ready to participate in the annual festival that seeks to drive away the Inugami spirit. However, they end up getting caught up in a certain incident…?! This dark, young-adult tale of childhood friends begins here…