Yoshu Suzuki (Ishihara Kuaihiko) lives with his son Hong Hui (Daozhi Junyou) after his divorce. His son is in a sentimental 15-year-old. Yishu feels sorry for his child. Honghui failed in the high school exam and passed the next spring. The child hopes to eat the lunch made by his father at noon, so the two have an agreement to make lunch for their son every day for three years. My son went to school for three years, rain or shine, and Yishu began the process of making bento for the sake of his beloved son.