Back Off! The Real Heiress Transmigrates into a Book and Becomes Normal

Because she couldn't accept the ending of a novel, she was inexplicably pulled into its world to begin a new life.

When a scheming woman gets in her way, she goes straight for revenge. When a scumbag man makes a heartfelt declaration, she slaps him right across the face. But the plot seems to have gone off the rails. Almost everyone seems like a yandere.