In a world where dark magics are forbidden, Lucy, a cafe owner, hides her dark witch descendants from the man who has a crush on her. Because, if the man ever finds out she is a dark witch, she not only will break the man's heart, she will too capture and arrested by the very man who swore to love her. So, she needs to make sure that he won't find out and...to never fall in love with him. For the sake of both of them. This is a forbidden love between a dark witch and the enforcer.