You Tian Su Night (Xia Fan) grew up in Kimura, where the simple living environment is very comfortable. The middle school of Sunight is a mixed school of primary and secondary schools. although there are only six students, children of all ages get along well with each other. Hirohai Ozawa (General Okada), a transfer student from Tokyo, broke the peace of the children in the village. In the face of this peer, Suyi showed enthusiasm, but Guang Hai was very self-centered and difficult to get along with. In summer, the students will swim at the seaside together. There is a shortcut to the seaside, but that shortcut has always been regarded by the villagers as a strange place, but Ozawa insists on taking the shortcut. There, an accident happened, and Suya got into trouble, but fortunately Ozawa came to the rescue. Suye later learned that Ozawa was the grandson of his former neighbor and had a good feeling for him. The communication between the two people led to the opposition of his father, who unexpectedly discovered the past between his father and Ozawa's mother. The two were immersed in the sweetness of their first love and spent an important holiday together, but the day of graduation came.