The Game of Hearts
It's a classic tale, really, one of princesses and princes. Kingdoms, struggles, power plays, and marriage. Set in the modern world, there are ten children, five beautiful princesses and five dashing princes. These children were born heirs and heiresses to their own small kingdom and for the first ten years of their lives they lived together in a location virtually unknown to the rest of the world. As their parents' first born children, however, there was an incredible amount of responsibility placed on their shoulders from the moment they were born. The kings and queens had decided, even before their children were born, that they would be arranged to marry each other. It was beneficial for everyone, after all. Their fates were, in many ways, intertwined. 

In time, the ten of them parted ways, each to walk their own path in life for the next decade. However, now the time has come. Many of the kings and queens are beginning to consider stepping down. To further cement their alliances with each other, it simply seems to be the time to put their plan in motion. The princes and princesses are to be married by the end of summer. They have four months to get reacquainted and, you guessed it, get hitched. Except, there's one small issue, their parents are expecting a bunch of twenty somethings to go through with this incredibly antiquated ritual... with no complaints? With no repercussions? Yeah, that's probably not going to fly. Royalty or not, these kids have grown up and have lives, responsibilities -- they might even already be in committed relationships.