He killed someone, she finished him off, even the crazy Marquis was shocked

[Bright and charming, a real noob who traveled through the book and became a cannon fodder villain] VS [A mad, black-bellied, fake, sickly, reborn, and short-lived young marquis] Li Siwan traveled through the book and became a cannon fodder villain who died in the preface. Why is it called a preface? Because the main text of the book tells what happened ten years after her death. In other words, not only did she not get the golden finger of holding the script, but she was also about to face the fate of dying tragically in prison. In order to save her life, she couldn't help but hug the long legs of the cannon fodder young marquis who also died in the preface. But who would have thought that the sickly, short-lived young marquis who was not given much attention in the book would actually reverse himself, become a mad and black-bellied person, and step by step rise to the pinnacle of power and change his own fate...