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 24hr 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.

Sonora informs the others about her plans to transfer to America at the end of the month, leaving the other C3 Club members downhearted. Wanting everyone together for an airsoft-style sendoff, Rento searches for Yura, eventually finding her at the arcade in a sorry state. With Yura seemingly residing herself to be a no-good person, Rento snaps at her, telling her to think about how others feel. Noticing Sonora also appears to be waiting for Yura to return, the girls make it their mission to make Yura rejoin the club. Meanwhile, Sonora is visited by Rin, who tells her about Yura's performance and suggests Sonora should act more like she used to. As Yura starts to really miss her friends, she is drawn to the shrine where she once again meets Choujirou, who tells Yura that she needs to accept herself. Finding her old gun in the shrine, Yura overcomes her self-pity and shows up to challenge Sonora in her sendoff match.