In this deeply moving first-person story, an introverted high school boy finds his classmate’s diary—and learns her biggest secret. Yamauchi Sakura is dying from a pancreatic disease and now he is the only one person outside her family to know the truth. The last thing the boy wants is to be her friend, but Sakura’s cheerful demeanor and their shared secret draw them together in this heartrending tale of friendship and mortality.

(Source: Seven Seas Entertainment)

The story centers on grade schooler Nanoka Koyanagi, who meets a short-tailed cat and three different women as she is out taking a walk. The first woman is Minami, a high schooler whom Nanoka sees has many wounds on her wrist. The second woman is another high schooler, constantly called a "whore" by her classmates. The third woman is an old lady, trying to live out her twilight years in peace.