She Turned into a Yandere Through the Book, and Then Turned the Heroine into a Yandere

[The male protagonist is invisible and yandere] + [The female protagonist develops into a yandere] + [Single female protagonist] + [Through the book] Gu Yan traveled through time and became a yandere villain in a novel, doing everything possible to pursue the heroine of the original book. Collect the other party's used tissues, steal the other party's personal clothing, and even fill the other party's desk with dead bloody rats. Just to show your unique love. But the other party is the eldest lady in the Beijing circle. Also possessed by a time traveler. In the end, he was treated like a dog and then thrown away to be fed to the fish. In order to change the original ending, Gu Yan could only continuously improve the other party's favorability, but as time went by. Things are getting more and more wrong. "It's either me or I'm playing the yandere. Sister, why are you really a yandere!" "Stop talking. If you get more than five meters away from me, I will break your legs!"