Through the Bookself-Rescue of an Unknown Supporting Character

Urgent, urgent, I am Shen Hui. Unfortunately, I am wearing a book. I am wearing the body of the villain's brother Shen Hui. Fortunately, I am only a supporting character from the past in the book. Unfortunately, I am about to die. How should I save myself! ! ! Intention: It's also OC hehe! Oc's love story＾3＾