Song Nian takes a part-time job feeding a cat and accidentally has a one-night stand with her employer, Lu Jingchen. She accepts 500,000 to shake off her uncle's family who are forcing her to trade her bridal gifts. After starting her new job, she discovers that Lu Jingchen is actually the group's CEO. Song Nian unexpectedly gets pregnant, and Lu Jingchen proposes a contract marriage, allowing her to leave freely and get a huge compensation after giving birth. To pay for her grandmother's medical treatment, she nods in agreement and moves into his house to live together. They agreed to sleep in separate rooms, but every night he applies stretch mark oil for her. They agreed on a secret marriage, but at the office he secretly arranges a single room for her and drops her off and picks her up daily. Song Nian resists on the surface, but her heart falls bit by bit. In the end, she gives birth to twins, and a family of five (plus the cat Niannian) lives a happy life.