Jane Wei is the heroine in a book about a domineering president who abuses her. After the male protagonist drained her blood and cut her kidneys in order to save the vicious female supporting character, she woke up and learned that she was just a tool heroine in a book about a domineering president that the author tortured for the sake of torture. In order to get rid of the author's control, she committed suicide. After Jane Wei's death, a system called "Save the Mistress of the Mistreatment Heroine" found her soul.
"The author's operation of torture for the sake of torture regardless of logic has caused the resistance of many female protagonists of sadistic stories, leading to the collapse of many small worlds. As the first awakened heroine of sadistic stories, I hope you can go to various small worlds to save them."
"What's the benefit?"
"After completing the mission, I can free you from the author's control and return to the original world for revenge."
"What do I do?"
"The original heroine cannot escape the author's control, but you can, you just need to fulfill their requirements."
Without plot control, Jian Wei lets herself go in various small worlds and makes everyone happy.
Very nice!