Amelia 

Amelia is 16 who lives in a village there’s not many people, but it’s nice and cozy and this village has a tradition every year every all the people in the village that are between the ages 15 to 17 is gathered in a circle in the center of the village and one kid is always chosen that kid proceeds to leave and doesn’t come back until their 20th birthday. Nobody knows what happens there. But the people who leave when they come back they’re always different. And you are the narrator of this story.