The female protagonist had transmigrated into a novel she was reading, and she had transmigrated into the female protagonist of that novel.

The female protagonist had transmigrated into a novel she was reading: She had transmigrated into the evil sister of the female protagonist in that novel. The evil sister was jealous of the female protagonist, so she drugged the male protagonist. After the evil sister died, the female protagonist transmigrated into her body. In the original novel, she was going to be killed by the male protagonist. What did the female protagonist know? Therefore, the female protagonist tried all kinds of ways to please the male protagonist in order to survive.
[Additional question: It's transmigrating from the void to the modern era, and she herself is also modern, like a CEO.]

Answer 1

If the female lead transmigrated to a novel she was reading, she might find herself becoming the female lead of that novel. In this case, she might start to explore this new world and encounter all kinds of characters and plots. She might find that this novel was very similar to the story she had imagined, and she might also find that it was very different from her own life. After transmigrating, the heroine might face various challenges and difficulties, but she would also grow and become stronger in the process.