It is the first round of the national high school baseball tournament but we're less concerned with what goes on in the baseball diamond, rather, it is the people in the stands who we watch. A former baseball team player named Fujino and two members of the theater group, Yasuda and Tamiya, have come to cheer the team. Miyashita, once the smartest person in the grade, has just lost her position to the captain of the brass band and is on her own. As these characters interact while watching a baseball game, their hidden thoughts also become apparent - "On The Edge of Their Seats" is based on an award-winning stage play created by a theatre group from a high school in Hyogo Prefecture.