It seems that Yukinari's bathtub broke (it was because of Miharu's strange power). To get the money to fix it, Miharu, Koyomi, and Kirie are working part-time as showcase girls for the event. Kirie tricks Yukinari into being a showcase girl in the guise of Yukina. Kirie also has Fukuyama do some perverted things to Yukinari - er, I mean... Yukina.
