With the club holding back on sweets to save for an upcoming 24-hour tournament, Sonora suggests they raise the money for the tournament by holding a stand at the school fair so that they can happily buy sweets with their own funds. However, this turns out to be a crayfish-related disaster, and they are soon left with no money for either. Deciding to work with what they've got, they decide to put on a cosplay shooting café, with Sonora managing to borrow a portable shooting range. As the festival gets underway, the club is visited by Karira's twin brother, Aira, who is from Seikou Academy's opera club, also planning to enter the 24-hour tournament. In order to draw in more customers, Honoka puts together a bikini water pistol fight display. When it is Yura and Sonora's turn to duel, Yura ends up landing a hit on Sonora whilst she was distracted by a kid bumping into Rento. Although the club manages to raise enough money for the tournament, they discover after the festival that the shooting range had become broken due to the water fights.