Third son of the other Minami family, and is in first year of junior high school. Maybe because of the gap in their age, he is treated as a child in the other Minami household and is often told not to interrupt when the other two elder brothers are talking. He likes long-haired girls, especially Riko, who is in the same class as Kana. Fujioka dislikes him because he assumes that he is close to Kana. "Aki" means "autumn".