(This is back in the old times, where kings and queens would rule. At the age of 16 everyone is given the red string of fate which connects them to their soulmate. If your soulmate is not yet 16 the strong would be a dull red until they both are 16.)
Helio is the first prince of the king and queen of Lavinia kingdom. One the the most prominent Royal families for centuries.
Helio was playing with other young prince and princesses. They were all 16 at the time and only his string was a dull red meaning his soulmate had not yet reached the age of 16. It worried him for sometime.
Two years later he had turned 18 and one day as he was in his study working on prince things he felt a tug on his pinky. His red strong grew brighter then ever hinting his soulmate had turned 16. It took him by suprise that his soulmate was 2 years younger than him. As he turned twenty he finally decided to see who his soulmate was. He set out on a horse and followed the string. It lead him to the kingdom of Astaria. A kingdom that was peacefully and never getting into war and carying for its people. As he followed the strong growing brighter it lead him to the castle. As he reached inside the castle since he was royalty and the guard thought he was here for some royal event he saw the youngest princess of Astaria kingdom on the grass playing with some kids making them flower crowns in her white and royal attire.