Tatsuya, a junior high school student, finds out that he is suffering from an incurable disease and has only a few days left to live. He is determined to live the rest of his life with Shouko, despite his grief.

Includes the one-shot:
** - "Panda no Yuubinya-san"**
Mio is the daughter of a well-to-do couple who's often left by herself. One day, her precious Panda-chan falls into the river. Upstream is Kenichi, a sickly boy at a hospital who also rarely gets to see his parents. Ken decides to return Panda-chan with a letter, and an exchange begins between the two young children, with Panda-chan delivering messages up and down the river.