Shiromitsugawa is an unremarkable academic city — until a large earthquake damages the sacred relic at the Shrine of the White Viper and causes artifacts from a parallel world to appear. These objects grant unusual powers to their owners, and one of them — the Evil Eye Artifact — has been used to turn people to stone. Kakeru Niimi teams up with his classmate Miyako Kujo and his sister Sora to track down the culprit. Their investigation puts them against an organization called Rig Veda, whose members include someone they recognize from school: their upperclassman Haruka Kosaka.