No date announced yet. This is an adaptation of a visual novel series. Check out the Crunchyroll article for additional casting information. Synopsis of the manga adaptation from AniList:

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.