The Story of the Two Pendants

One mysterious day, two twin babies, a girl named Violet and a boy named Caelus, showed up out of the blue, with only pendant necklaces in their possession. Eighteen years later, three guys with the faces of greek gods transferred to their school. Soon after, secrets came out of the horizon and talks of magic, werewolves, Kings, Queens, and knights were now a topic. Who really are these twins, and where did they come from?