In order to urge her to get married at the end of the year, her brother Su Ran invited Lin Yue to pretend to be his girlfriend and go home. However, Su Mujin fell in love with this "fake sister-in-law" when she first saw her. The gentle and dazzling Lin Yue was the light that broke into her ordinary life. He could not hide his heartbeat when he approached awkwardly. He secretly drew her appearance, secretly bought her favorite snacks, and even showed careful care.