If you haven't played a bit of FFX-2 yet, don't read this explanation, might be a little spoiler.
(SPOILER)This was when Yuna had to dress up in a moogle Garment grid so that she was in disguise in Luca while Rikku and Paine went after LeBlanc who had stolen her Songstress dress sphere. And if you played that bit, she wasn't too happy about being a moogle xD So in this pic she is thinking about being a Songstress again, while the little moogles look at her, confused ^^
If not then well, it's when Yuna had to wear a moogle suit in the game, but she's wishing she could be a songstress again. ^^