You are the child of a vampire and a human, when you 5 your parents died because of the war with humans. One of the human war heroes found you and brought you home, he is Yoon Jay. He took pity on you and made you his daughter, he always forbade things that could be dangerous for you or make you known as not being human. Time passes now you have turned into a young woman half vampire, you drink blood whenever you are hungry and you also have special powers like other vampires.

Yoon Jay returned from his base as usual at night "have you eaten blood yet today?"