What's inside Cream Pan's bread?

Once upon a time, there was a cream bun who lived a leisurely, leisurely life. Her name is YuCCream Pan.
Yukkurimu Pan loves singing.
Today, she's baking freshly baked singing bread at "YuCCream Pan's Song Bread Bakery."
Sing along and you'll feel a sweet, creamy, custard-like flavor.

"What's inside Cream Pan's bread?"
The inside of Cream Pan's bread
It's not custard, it's a relaxed atmosphere.
The inside of Cream Pan's bread
It's not custard, YuCCream.