There are five continents of roughly-equal size, side-by-side, and all of them meet to an approximate point in the middle. At this meeting of borders, there is a tower: The Tower of Five Hearts. One Royal Family is in charge of upholding the peace for every continent, by marrying off their child to a prospective girl from one of the continents. It’s more of a contest-five girls trying to be Maids, in the hope that their master (the Prince) will fall in love with them...

However this time, it’s a Princess.