In the east of the world, there were 4 great castles. Gryffindor, Slytherin, Ravenclaw, and Hufflepuff. Gryffindor and Slytherin in the center, separated by a few acres. The other two kingdoms were surrounding them, marking the great importance of the future bind between the two Princes of Gryffindor and Slytherin. These great kingdoms got along famously, until a man named Tom Riddle, broke away from the Slytherin Court. Staking his claim on the young Prince of Gryffindor.
The King of Slytherin wanted nothing to do with Tom, knowing that he had an obsession with the Prince of Slytherin's bind mate. Tom was furious, as were his parents. His parents didn't like what they're son was doing, but because he was their only child, they moved from the inner circle of the Slytherin Court. The Riddles' built their own castle on the brink of the kingdom, far from the other Castles.
The King and Queen of Gryffindor were paranoid of their son and appointed guards everywhere for his safety. One day Tom came to the Gryffindor Castle and told the King and Queen that he demanded to be bound to their son, but they declined. Not telling him that they're son was already bounded. Tom tried to use his ancient powers; in destroying the family that tried to keep The Gryffindor Prince away from him, but Gryffindor Castle were protected by the Powerful Sorcerer, Albus Dumbledore. Tom was angry and left, promising to come again while the Prince was in his 16th year.
When the King and Queen of Slytherin found out about the failed attack, they appointed their son's closest friends to make sure that he realized his feelings for the Prince of Gryffindor, making sure that they're relationship was already in motion by the time he was 16. The King and Queen of Gryffindor, strengthened the protection spells around their son, so if he was ever kidnapped, he would not be harmed or forced to bind.
So the two greatest kingdoms lived in bliss, awaiting the future merging of Gryffindor and Slytherin, not knowing that a few miles away Tom Riddle planned to change their arrangement, One way or another.
And this is where our story, begins…