Xu Xuan'an is just an ordinary young man with extremely righteous views. Who knows that he once traveled through time and became a race with the most righteous views in the demon world, a succubus. In order to protect his moral integrity, Xu Xuan'an has been cautious since he was a child. He disguised himself as a positive and optimistic young man into a high-level demon who is cold and abstinent and kills without batting an eye.