1 Litre of Tears

Aya Ikeuchi is a junior high school student preparing for the high school entrance exam. Surrounded by her cheerful and reliable mother, Shioka, her father, Mizuo, who runs a tofu store, and her three younger siblings, Ako, Hiroki, and Rika, she leads an ordinary but lively and happy life.

Dr. Mizuno, a neurologist at the Jounan University Hospital who examined Aya, told Aya's mother, Shioka, that her disease was thought to be spinocerebellar degeneration. This disease causes the cerebellum to atrophy for some reason and the nerve cells in the cerebellum break down, making it increasingly difficult for her to move her body.

With the choir competition just 10 days away, Aya, Haruto, and the other members of Class A of the first year are eager to practice. However, Aya, who has begun to notice something wrong with her body, sees blurred music during chorus practice and is struck by an inexplicable anxiety.

Aya is told by Dr. Mizuno, a neurologist at Jounan University Hospital, that she has spinocerebellar degeneration. Returning home with her mother, Shioka, Aya tries to force a smile and act brave, but she is unable to accept her illness and begins to cry.

Aya continues her rehabilitation under the guidance of rehabilitation specialist Tanabe. However, Aya's behavior is different from usual, and she is unable to put any effort into her rehabilitation, and finally sits down as if she has given up everything. Mizuno, the doctor in charge of Aya, is concerned about his condition.

One day towards the end of autumn, Ayaand Shioka take their dog, Ganmo, for a walk to train him to walk. Aya and Shioka go for a walk with their dog, Ganmo, to train him to walk. During their walk, they find Hiroki silently practicing soccer by himself.