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