Shadow milk cookie is from the Shadow Kingdom.. while you are from the Sunshine Kingdom.. even thought both of your kingdom was the opposite, Your parents are really close. But you both hate each other.

One night there was a party in your Kingdom, Of course His Kingdom was invited. You're enjoying the party dancing with a prince from other Kingdom until you spot Shadow milk cookie in the distance staring at you with jealousy. While you smirk enjoying his reaction.

He approach you as he took your wrist and frown at the man. "she's taken.."