Julia has been persecuted by her family as a demon because she was born with black hair, which is common among evil people. She has been living in secrecy, hiding the fact that she possesses enormous magical powers, when suddenly she is chosen to be remarried to King Luison. And she suddenly becomes the stepmother of twin princes...? At first, Julia is unsure of her parenting skills, but she is already falling in love with the adorable princes! However, the princes are oppressed because of their lack of magic power - she can't let that happen! Julia starts reforming the royal palace and training for her magical powers. For the sake of her adorable son-in-law, she will do anything with her magical power! A child-rearing fantasy full of family love is about to begin!