Deciding to Become a Villainess

Introduction to the Work: For a week now, I've been having the same dream. My family died. My house fell. My sister was taken hostage and became a puppet empress. For my sake, a man named Miriam Lisios sacrificed his life to turn back time. "...But that wasn't a dream?" [Yup, you regressed, nya.] A small head suddenly popped into view, a triangular mouth, and perked-up ears. A cat that suddenly appeared keeps making strange claims... [If you do nothing, the same future will continue, nya.] I couldn't believe it, but everything was happening as the cat said. Moreover. [As the price for risking his life for you, Miriam's death day has been set, nya.] The Duke became terminally ill ...