"Even if you apologize in tears, I won't forgive you!" Hana, who has been training at Touko's agency, one day suddenly receives a mission assigned by Touko. The task is to investigate an inexplicable incident occurring at Reien Girls' Academy, the school she attends, where the culprit is said to be a fairy. Hana arrives at the academy, now quiet due to winter break, to conduct her investigation. However, the so-called "secret weapon" prepared by Touko for Hana, who cannot see fairies, turns out to be—her love rival (?) Shiki Ryōgi.