The story centers on Kiryu, a young man who returns to his rural hometown during his university summer break. The setting is quintessential Japanese countryside—quiet, lush with greenery, and evocative of a simpler time. This environment serves as a narrative device to strip away the complexities of city life, allowing the characters to focus solely on their interpersonal connection.
The first episode of "Shounen ga Otona ni Natta Natsu" introduces viewers to the main character, a young boy named Koji, who seems to be on the cusp of adolescence. The episode takes place during a hot summer and sets the stage for Koji's journey. shounen ga otona ni natta natsu ep 1