Natural substructure

Suya Uda (played by Kaho) grew up in Kimura, where the simple living environment is very comfortable. The middle school Suye attended was a mixed primary and secondary school. Although there were only 6 students, the children of different ages got along well with each other. The transfer student Osawa Guanghai (played by Masaki Okada) from Tokyo broke the peace of the children in the village. Facing this peer, Suye showed enthusiasm, but Guanghai was very self-centered and difficult to get along with. In the summer, the students would go to the beach to swim together. There is a shortcut leading to the seaside, but that shortcut has always been considered by the villagers as a supernatural place, but Osawa insisted on taking the shortcut. There, an accident happened and Suye fell into trouble. Fortunately, Osawa came to help. Su Ye later learned that Da Ze was the grandson of her former neighbor and developed a liking for Da Ze. However, the relationship between the two aroused opposition from Suye's father, and Suye unexpectedly discovered the past between her father and Osawa's mother. The two were immersed in the sweetness of their first love and spent important holidays together, but the day of graduation still came.