This doesn't fall under romance. Just say that the kids are adopted because I don't think it's possible for someone to have so many kids with different ethnicities around the same age.
By the way, the story the reader tells is from the Grimm Brothers' fairy tales. I forget the title, though. There were only four sons, but for the sake of there being five, I added a carpenter.
This is for
I do not own any characters of Axis Powers: Hetalia. They belong to Himaruya Hidekazu.
The original story belongs to the Brothers Grimm, though they have passed on and different arcs have sprouted up.
Any other similarities to characters, settings, scripts, or stories from other pieces of literature or media are purely coincidental.
©This story belongs to me, ~GydroZMaa