Reborn as a Cannon-Fodder Side Character, I Just Want to Survive Until the Happy Ending

(Reborn in the womb + System + quick transmigration + transmigrate into a book) After Shi Rui is murdered, she joins the Time Management Bureau, binds herself to a prenatal transmigration System, and travels to various worlds to complete plot missions. (Some worlds have couples, and some don't.) World One: The Luoshen Pearl