The story revolves around a high school student named Shinya Matsumoto and his love story, which takes place one summer vacation. Shinya unexpectedly encounters a car accident, which results in a mother and son being taken to a hospital. The son, Daisuke Kirishima, is completely fine while his mother, Reiko Kirishima must stay in the hospital for three weeks and is unable to look after her son thereafter.

(Source: MU)