I Mistook The Hidden Identity Of The Sub Male Lead

On the first day of the New Year’s party, Mayerie realizes that she is an extra villain in the novel. Mayerie tried not to get involved with the original for a smooth life. But unintentionally, she discovered a huge Crown Prince's secret that was not revealed in the novel! Besides, why does the original villainess like me so much? The original story was about the characters of the novel who want to run away from each other, but things keep on getting twisted. Something’s really wrong!