Su Shuangyue, a well-known manga artist, carries her post-marriage memories and is reborn back to her 18th year at the start of college. She publicly locks onto her future husband, top science student Lin Yanshu, takes the initiative with direct advances to cohabite, and unfolds a sweet campus romance. Lin Yanshu grows from a cold-and-aloof top student into a wife-protecting maniac, leading his roommates to lay out a smart healthcare startup. Together, the two handle Bai Wan's paranoid entanglement and Lin Zeyu's suppression and competition, while redeeming Chen Jiahao, who was wounded by his original family. Ultimately, romance, friendship, and career run in three parallel lines, ushering in a two-way rushing youth sweet-pet story.