Touch follows the lives of three people: Kazuya and Tatsuya Uesugi (identical twin brothers) and Minami Asakura. They've lived next to each other since they were babies, and their parents even built a playhouse in the yard between the houses in order to keep them outside and not destroying the regular houses. As they grew into their teens, they suddenly noticed that one of them was a girl, and Kazuya and Minami became closer. Kazuya, the younger twin, was an excellent student (as was Minami).
Tatsuya is really talented but also a bit of a slacker. Since middle school, Kazuya has received awards and recognition for excellence as a pitcher and baseball player. Tatsuya, however, is more inclined to let his brother take the limelight, as he is unwilling to directly compete with Kazuya. This includes Minami as well; while most people (including their parents) suggest that Minami and Kazuya will make a perfect couple, Minami tends to prefer Tatsuya.