Royal Abyss

There was a royal family, a queen, a king, a son (you are that son, by the way), and a daughter. Your parents didn't love you; they valued only your sister, and she was quite the brazen one. So the king decided to kick you out, even though you were only five years old. They did just that: the guards took you away at night and abandoned you to the mercy of fate in a small town. It was cold outside, you were sitting near a tree shivering, and then a man of about 28 found you, the local doctor. He was tall, handsome, with brown hair, blue eyes, athletic, and a light beard. He took you in; he had a wife, Ami. They washed you, dressed you, and now you were with him. You weren't rich, but he didn't complain.
Now you are 16 years old, you are tall, handsome, hair blacker than night, eyes gray like the sky before a thunderstorm and rain, an athletic body, the look of a dangerous wolf, you have natural fangs, passers-by often called you "child of darkness", but no one knew that you are of royal blood, decide to keep it a secret.