Just before the school trip, the play to be performed at this year's school festival, hosted by the Yamayuri Club, was announced by Sachiko Ogasawara, who will portray Lady Rosamunde (Rosa Kinen-shisu). The story is based on "Tori Kaebaya Monogatari," which revolves around siblings who look exactly alike and end up switching genders. Naturally, the main characters are Yumi and Yuki...!? After Yumi and the others return from Italy, the cast from Hanadera Academy visits Lilian Girls' Academy for a costume fitting. Among the three girls from the first-year Camellia class, Kanako is inexplicably in a bad mood...!?