The Prince & Princess of Earth

Evan and Isla Kamane are Amimon the King of Earth's children. He left them with their mother and forced her to raise them. Isla is a Upper First Class Exorcist that is about to become a Are Knight. What happens when Evan finds out who his father is? What happens when Isla falls for a Exure named ( Not gonna tell you :p)? And what happens when Evan finds a love of his own?