Use Evil Characters to Fight Against the System Plot

She traveled through the book and became a decent heroine, but there was a system bug and she was forced to have a vicious female supporting character. The good news: The heroine has a halo and holds the script. Bad news: The character is too bad, and he will be punished if he can't do it! A funny girl is forced to be a villain. The more she becomes a villain, the more addicted she becomes. How to break it? When she was at her worst, when she met the most upright man, Shen Rulin just wanted to escape. But she suddenly discovered that he seemed to be worse than her. What was going on?