Otome Game No Hametsu Flag Shika Nai Akuyaku Reijou Ni Tensei Shiteshimatta...My Life As A Villainess: All Routes Lead T E 3

And then remembers that she is not actually the duke's daughter. The villainess in the game usually winds up dead or exiled, so katarina decides to use her knowledge of the game and its routes to avoid any bad situations.