Ye Xu is reborn to the first day of her 18-year-old university, pleasantly discovering that she has returned to her youth and vowing to change her life. Yet she finds that her ex-husband Ji Ran has also been reborn, and the two test each other out at school. Ye Xu changes many things from her past life that made her regret, saves a good friend, and helps her good best friend win over the boy she has secretly loved for over a decade in her past life. She protects her mother in advance. Her special defense department recommendation quota was swapped by someone else in her past life, and after rebirth Ye Xu vows to take back her own life.