A Holiday in Oishi-Na Town. Princess Yui?!

Synopsis

Princess Mayra — princess of the distant Iisuki Island, known as "the Princess of Smiles" — arrives in Oishi-Na Town. The princess is the spitting image of Yui. Summoned by Amane, Yui meets the princess and, learning that she has been so busy she has had no time to eat anything delicious, suggests they switch places so the princess can see the town. Accompanied by Kokone, Ran, Amane and Rosemary, the princess heads out into town incognito. Meanwhile, Yui, dressed in finery, visits the art museum and the museum on the princess's behalf, only to be carried off by men in black who appear out of nowhere. The one who targeted the disguised Yui was Santhar, the princess's cousin, who schemed to take the throne for himself. Santhar tried to disrupt the princess's speech, but Yui transforms and escapes, while Finale and the others escort the princess to the speech venue. Reaching the venue safely, the princess — under the watchful eyes of Yui and the others — delivers a dignified speech in her own words, without reading from a script.