During the exam break, Yumi receives a call from Kashiwagi. It turns out that Touko has run away from home and hasn't returned! Yumi tries to call Noriko and Kanako, thinking they might have some idea of where she is. However, before she can even start searching, Touko appears at Yumi's house! She had encountered Yuuki, who was on his way home nearby. Yumi is unable to ask Touko about the reasons for her running away...! Is there a change in the relationship between Yumi and Touko...? Something is going to happen on Christmas Eve!