Ei Daisuke always carrying an army knife and was good at peeling fruit. His friends heard stories that Sakae got married to the only daughter of a farmer. The memories of middle and high school will come away in the heart of childhood friend Yumi Nakamura. At the same time there are things that she could not convey to Sakae that she regrets. Yumi faces the thought of the past through 10 years, and the passage time takes her life onto a certain action.