Ep. 11: The girls struggle with the heat and install an air conditioner despite Yui's allergy.

11

On a sweltering day, the club members notice Ton shedding in his tank and seek relief from the heat. They drag Sawako from the staff room so Tsumugi can retrieve a larger aquarium. The group questions the lack of air conditioning in their room, discovering that Ritsu failed to submit a request because she missed student council meetings. After appealing to the student council, an air conditioner is installed. However, the relief is short-lived as Yui collapses, realizing she is allergic to the cold air.