After Dressing up as a Cannon Fodder Female Supporting Role, I Became Famous by Acting Bad.

The heroine travels into a book called "The CEO's Contract Sweetheart" and becomes a vicious female supporting character with the same name - Su Wan, the true daughter of the Su family. The original owner lived away from home since childhood, and was brought back to the Su family at the age of 18. He had a twisted personality, was jealous of the fake daughter, and targeted the heroine of the original book at every turn. In the end, he ended up miserable: his family was ruined, his face was disfigured, and he died miserably. After being disguised as a vicious female partner of a wealthy family, a social creature chose to show off in order to save her life. As a result, she became more and more popular and even kidnapped the ultimate boss from the original book back home.