Blackened Villain, Please Spare Me!

She rage-commented on the worst Mary Sue novel ever written—and woke up inside it as nameless cannon fodder. Ten years too late, Yan Luo discovers she's the reason the story's villain turned dark. Now a system demands she prevent his corruption or die trying. There's just one problem: he already hates her guts, and in a world where 'beauty saves the day' counts as logic, how is she supposed to fix a decade of damage? The villain's patience is wearing thin, and so are her options.