Izumi-kun and his friends are busy getting ready for the school's cultural festival. Izumi-kun is working with the group in charge of making costumes for their class's display, and Shikimori-san is in the group working on decorations. They don't get many chances to talk, and when they each see the other having fun chatting with their groupmates... And then the festival begins at last. Izumi-kun is so busy his head is spinning, and this causes his unlucky nature to awaken yet again. On top of that, he's on duty in the library the next morning. The one on duty with him is Kamiya-san, whom he first met the previous year through the library committee. But she's acting a bit different today...