I Won't Be the Obsessive Villain's White Moonlight

Su Qiao transmigrates into a book as the female lead. Surely she can cheat her way to success, fall in love with the male lead, and reach the peak of life? But dreams are wonderful, while reality is cruel. She arrives during the female lead's school years and ends up living under the same roof as the story's biggest villain. What did she do to deserve this? For the sake of her future happy life with the male lead, she decides to reform the villain from the ground up. But why is everything getting more and more off track? How did the villain manage to turn her against the male lead?