I've Become the Devil's Master

Synopsis

She became a villain who blackened the male lead in a devastating novel.
Having already regressed innumerable times, she decided she would save the male lead trapped in the basement and escape. Finally, his identity was revealed and a happy ending was just around the corner.
What do you mean abuse? She fed and dressed him herself, so she only had to run away. "If you throw me away like this..." Redian, who became the crown prince, held her hand tightly. "I'm going to chase you to hell, Master." The male lead seemed to be too immersed in his character. (Source: Kakao Entertainment Corp., translated)