During winter break, Reien Girls' Academy experiences peculiar happenings, leading Azaka Kokutou – a trainee mage and student – to investigate on her mentor's request. While on a mission, she discovers another mage stealing students' memories using fairies that escape her magical radar. To overcome the situation, Shiki Ryougi – known for her distinctive eyesight abilities – is dispatched. Nonetheless, Azaka and Shiki have a head-on collision, as the former considers the latter as a love rival. However, as the issue intensifies and the veil on the mystery uncovers, Azaka must put aside her clash with Shiki and partner to save her fellow students.