Reincarnated as a Villainess, Did the Imperial Princess Turn Evil and Become the Antagonist?

Reincarnated as the doomed villainess of an otome game, Felice decides to give up. There's no way she can beat the princess with the protagonist's plot armor, so she might as well enjoy life before her ruinous ending arrives! Wait... The princess suddenly wants to marry me and is openly declaring war on the whole world? Hey, that's not how your character is supposed to act...