Mai-Otome

Season 1

Episode 12: "Masquerade Ball?" "Kamen Butō kai?" (仮面舞踏かい?)

Arika impersonates the missing Mashiro and meets the foreign prince Takumi, while Nina pretends to be Arika. Meanwhile, Mashiro takes the name of Nina and ends up in the slums of Windbloom, where she meets a foreign boy.