After reading the book, I became the favorite of the scheming male lead 24

The mischievous girl accidentally transmigrated into a vicious supporting character in a book. She didn't want to die tragically, but originally wanted to change the plot and help the scheming male protagonist conquer the female protagonist in the novel. Unexpectedly, the harder he worked, the more heartbroken he became. The male lead developed a strong interest in the female lead who had undergone a major personality change