In ten years, life changes. Su Ruowu and Su Ruozheng are biological sisters who are in love with their childhood sweetheart Ye Hui. Ye Hui fell in love with Ruowu during college, but had an unexplainable affection for Ruozheng. One night, Ye Hui mistook Ruozheng for Ruowu and almost made a big mistake. The originally peaceful life of the three people was stirred up, and the story took a turn... His sister Ruozheng was admitted to college and met Ye Hui's roommate Bai Huijun. Bai developed a crush on this maverick girl, but unexpectedly discovered that Ruozheng had Ye Hui in her heart. After Ruozheng left to study in the United States, Ye Hui confessed the truth after drinking. The hidden secrets of that night were revealed one by one, and Ruowu was heartbroken. At this time, Ye Hui was facing graduation and his ambition was hard to achieve. Ruowu began to become apathetic and focused on preparing for the postgraduate entrance examination. With the help of her junior brother Han Simei, she unexpectedly fell in love with her. Ruowu is facing the threat of his senior brother's girlfriend. On the other hand, his senior brother's girlfriend has an inextricable ambiguity with Ye Hui... Ruowu rejects Han Simei's love and is determined to study hard in graduate school. However, the originally peaceful life was disrupted by the return of her sister Su Ruozheng. Ruozheng returned to China and experienced marriage and abortion, only to find that Bai Huijun was still standing there waiting for her. Although Ruozheng had grown up, there was a lingering shadow in her heart. She found Ye Hui, only to find that he was no longer the young man with great ambitions and great success...