The snow is falling onto the ever-blossoming cherry blossom trees. Sakurai Yoshiyuki and Tsukishima Koko have gotten over their failed relationship and are now able to exchange smiles and friendly words as classmates.

As the school's Christmas Party draws near, a new story begins, a story of the ties Yoshiyuki has with Asakura Otome and Yume, a story of happiness and hope.

However, Yoshino Sakura alone has a clouded expression, knowing as she does that a disaster is imminent. No matter how happy the dream may be, the dreamer must eventually wake.

How will this disaster affect Yoshiyuki and the others?