It's the beginning of the second semester and on her way to the first day of school, Tsubasa has a short meeting with Mayoi who reveals that she has just came from Koyomi's house where she forgot her backpack, but could not retrieve it as he was not at home by that time. Soon after, Tsubasa has an encounter with an apparition in the form of a huge white tiger who just passes by her and upon arriving at school she tells Hitagi about it. Hitagi points out that despite Koyomi being the best person to assist her, Tsubasa did not call for his help at all, also remembering that in fact he always stood for them without the need of asking him...