I Am the Only One in My Family Who Is Not Sick

Have you ever thought about there being a group of aliens in human civilization? They have supernatural powers like in the movies, abilities that ordinary people don't have, and they live a glamorous life. Will that come at a cost? In front of everyone, they are just like ordinary people, but behind the scenes, they are patients suffering from "serious illness" and in urgent need of "medicine" treatment. They live in fear every day, fearing that they will "die" of the disease.