Rather you should be wondering if that's a good mix to eat all at once or split it.
Chocolates, creams and custard do mix, but I am not sure of Anko and Black Anko would mix well with any of those 4, then again my knowledge of Japanese Candies and Pastries is rudimentary if not outright non existent, so maybe there are anko with chocolate or anko with cream stuff on the J Land.
Fried crispy sweets are actually a restaurant menu item. Outer surface being fried while the inside is still soft/moist. The one I had was filled with crushed black sesame paste.
The only reason I'd cook a Yu is to make them suffer...
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