Itoko no Ko

A boy spends his summer vacation at his uncle's home in the countryside, where he is stuck with his younger cousin, Sou. There are no convenience stores or buses, making life inconvenient. Sou is a tanned, energetic girl who constantly leads him around, treating him more like a friend than the older cousin he is. Her cheerful and teasing behavior causes him to feel flustered, and he struggles to maintain the composure expected of his age. As time passes, he finds it harder to resist the effect she has on him. The story follows his growing feelings and the difficulty he has in keeping his emotions in check around her.