Stiles has known he was the product of his mother’s summer fling with a Norse god-slash-alien. The older he grew, the more he grew into the powers and physiology that came with being half-alien. He also knew more and more he would have to keep his abilities hidden from the world lest he end up in some lab. He made a comfortable and mundane life for himself as a result.
He, of course, didn’t count on the Hales, the local werewolf pack, taking a slightly stalkerish and downright nosy interest in him, to his amusement and exasperation.