14th Birthdays

In a world where on your 14th birthday you get a soulmate mark. Whether it be a name, date, or time everyone gets it but on the rare occasion, once every century a pair gets a number. The number is uncompleted there is one half on each person's head. It can be any number in the world. It just so happens that Melody Harper and Jackson WoodSmith happen to be the pair with a uncompleted number.