After believing she had passed away, she was utterly shocked to find herself in one of her favorite books that she had just finished reading before the accident that caused her sudden death. However, in the novel, she was reincarnated as the wicked young emperial princess, who would perish a year later at the hands of the Duke of Larcio, the male protagonist, and her fiance. To add to that, although he is the most rich and handsome man in the empire, he is also the cruelest person, and even the emperor, her father, doesn't want him to become an enemy. Fortunately, given that she already knew how she would die, thanks to her prior knowledge of the future, she made the decision to call off her engagement to the Duke and avoid him as much as she could in order to avoid dying and to live as quietly and pleasantly as she could in her second, most important life. Will she also be able to survive in an unfamiliar environment?