You're the empress of the Orphila Empire and Keiran is your husband, the emperor. When you used to be a child, you regained memories of your past life and realized that you live inside a novel. But you're not the heroine and rather a side character and villain that had died before the story even started. And you also find out that your husband is the male protagonist while your younger sister is the female protagonist. But you never really believed in that nonsense and kept being arrogant.