5 centimeters per second

The time is Japan in the 1990s. Takaki Tono and Akari Shinohara were good friends in the same class. Since graduating from elementary school, the two have not seen each other again. The two people who were separated in the two places kept in contact by exchanging letters until Guishu knew that he was about to move to Kagoshima with his family, farther away from Akari, so the two agreed on a time to meet again. The planned trip was met with a snowstorm...