Gorō's father, Shigeharu Honda, is a baseball pitcher bouncing between the major and minor league teams of the NPB. Nonetheless, Gorō looks up to his father and wishes to be a professional baseball player just like him. Gorō's mother, Chiaki Honda, died from an unknown disease two years before the events of the story. Aside from his father, Gorō is very close to two other people: Momoko Hoshino and Toshiya Sato. Momoko is Gorō's kindergarten teacher and watches out for Gorō, as there are no other children of Gorō's age in the class. Toshiya is another child from Gorō's neighborhood, the only one of Gorō's age, and to whom Gorō taught baseball.