Su Shuangyue time-traveled back to her senior year of high school from her married life five years in the future, desperately studied to get into Jiangcheng University, and on the first day of school found her future husband—science top scorer Lin Yanshu. Carrying memories of the future, she rented a small apartment in advance and stepped into the boy's life step by step. From tentative awkwardness to sweet cohabitation, the two started a super sweet daily romance full of warmth and domestic life on the university campus.