[Normally Mickey is all sunshine and smiles and cheer, which probably annoys 90% of you. And with most holidays, he can ignore his own loneliness and take joy in having fun with his new friends! But with such a romantic holiday there, it's harder to be happy for everyone without feeling a little miserable himself.
Simply put, he misses his wife.
So he's trying to make an effort to avoid all this lovey-dovey stuff so he can mope in private - but, well, it's Kiseki, "We like the illusion of free will, but let's not get too crazy here".
He wants to find a snack, he finds himself in the chocolate making area, and just grabs something already made and walks off. He tries to take a nap in some gardens, and there's all these romantic roses. He tries to hide in a building, it's the ballroom! Throughout the day, he'll groan in frustration and sullenly chew some chocolate.]