With Yukari's birthday falling on Christmas Day, Nanako hopes to make her birthday party a big success. After shopping for a present for Yukari, Nanako attends a Christmas party with her classmates, Misato, Satsuki, and Shouko, who give her a Santa outfit to surprise Yukari with. Although Nanako ends up forgetting to take her present, Yukari nonetheless appreciates her coming over to celebrate her birthday, with everyone else showing up the next morning to celebrate.