When the university town of Shiromitsugawa was struck by a large earthquake, the sacred treasure in the Hakuda Tsukumo Shrine was damaged and mysterious objects called ‘artifacts’ began to appear from a parallel world. These artifacts granted special abilities to those that possessed them. There was an incident where someone abused these powers and turned people into stone. Kakeru, who has a strong sense of responsibility, lent his assistance to Miyako in seeking the culprit.