It has been thirteen years since I reincarnated as the extra daughter of the marquis in the novel. After some struggles in the beginning, I am now loved by my family and on the verge of marrying the northern duke. However, when I opened my eyes, I found myself in my Korean form...? Moreover, next to me is the unconscious daughter of the marquis! The fact that I reincarnated was obviously discovered, and my family threw me into the dungeon. Furthermore, the northern duke is trying to kill me by labeling me as a witch. Since it has come to this, I have no choice. I will become a real witch! * "This is ridiculous. A witch who uses black magic still likes me?" ...And I will take down that overly self-conscious northern duke! * ...But why have I become the ruler of the north? Since this is the case, I might as well do an excellent job and ruin the previous northern duke's reputation.