The Duke's Daughter Trained a Wild Beast

Your Highness, the ruthless prince, please enter a political marriage with me.” I woke up to find myself reincarnated as a pitiable side-character noble in a novel. If things stay this way, I’m destined to die and the world will collapse. To survive, I must reform the mastermind behind it all! However, my familia is the weakest—a tiny chick…