On the day she wins a six-figure lottery prize, Wen Zhili unexpectedly transmigrates into a campus romance novel as the overachieving ex-girlfriend who shares her name and is destined to be a disposable supporting character. The system, Ace, tells her that she must maintain her persona as the male lead Shen Xu's overachieving girlfriend and avoid being dumped. After completing the storyline, she will receive a grand prize of five million. If she fails, she will be forced to endure the original character's fate of dropping out of school and falling into ruin until the male and female leads have lived out their entire lives.