Sosei, a senior in high school, has had a crush on his childhood friend, Shinka, in the same class, since childhood, but he had promised himself never to tell her about his feelings. However, on December 26th, on his way home from a Christmas party that was held a day late, Shinhana dies in an accident. This can't be real!" As if drawn by Sousei's strong desire, he finds himself back in the world of seven days ago. Can Sousei and Shinka welcome the tomorrow that they have not yet seen in the fut...
