The sorceress and the protector

Amethyst is a typical girl with a past she herself is unsure of. But one day she discovers a teenage boy, who is probably about the same age as her on the ground wounded.
She tends to his wounds but the boy brushes her off coldly without a thanks. He appears at her school in the middle of the school year and makes all the girls swoon. However, He doesn't seem to be looking for popularity and seems to have an agenda by appearing out of nowhere.

And the weirdest thing happens when Amethyst finds out he is not exactly human. Upon stumbling upon a shocking discovery, Amethyst's life will never be the same again...