With strange events occurring at Reien Girls' Academy during winter break, Azaka Kokutou, a student and apprentice mage, is sent by her master to investigate. It turns out that another mage has been stealing the students' memories using fairies that, despite her magical talent, are invisible to Azaka. So Shiki Ryougi, an acquaintance with special eyes who can see what Azaka cannot, is also sent to the academy to help...