As they discuss their plans for their school festival, Yōto and Tsukiko stumble on a pink-haired girl named Emi. It occurs to them that Emi is Ponta's younger sister. Ponta then asks Yōto to take Emi on a tour at their school, which Yōto then agrees. Emi later discovers that Yōto is considered a huge pervert in their school and suddenly wishes upon her miniature cat statue to turn Yōto popular and their school more enjoyable. The outcome of Emi's wish turns their school's architecture to into ancient Rome, and the girls wear swimsuits as uniforms while addressing Yōto as "Prince". Tsukiko later blames Yōto as the maker of the wish and prompts him to cancel it immediately. Tsukushi, on the other hand, sides with Yōto in order for her to show off her good side to Yōto's "evil-twin brother". Afterwards, at Yōto's house, as Tsukushi scavenges pictures of Yōto's "twin", Yōto realizes something about Emi, as Ponta's "little sister" is actually his pet rabbit.