it's a very popular webtoon series turned graphic novels. in the universe, faeries are oppressed heavily, and our main character is a fairy in hiding as a lady in waiting to the kingdom's princess. her father took the fairy, lydia in, after her parents were killed. soon, lydia becomes an apprentice for the castle's mage, and falls in love with the metal being used as a weapon against faeries. his name is modeus and he is made out of the spirit of a slain fairy. i promise it's so much cuter than i make it sound but the story is so compelling. the first webtoon i fell in love with.