Song Xiaoyu is the daughter of master Yang Guang. Before Master Yang Guang died, she entrusted Song Xiaoyu's mother and daughter to Yang Guang. Therefore, Yang Guang has been taking care of Song Xiaoyu for many years, not only for her to go to college, but also for her food, clothing, housing and transportation. For Yang guang's concern, Song Xiaoyu took it for granted. Even though he knew Yang Guang was not easy, he still took Yang Guang's money and bought brand-name clothes and bags everywhere. He wants to find a good job, marry a rich husband, join the upper class and live a good life.

In Song Xiaoyu's mind, she doesn't like being a contractor's family, so she always regards Yang Guang, who is also a contractor, as her brother. Even if her mother thinks they should be husband and wife, she never thinks about it.

When looking for a job, she always wanted to hook up with rich people, and she was treated as a mistress. Fortunately, she was saved by Yang Guang. Aware of the cruelty of reality, and after becoming a winner project manager and making a breakthrough in their career, they had an idea, but they always regarded her as their sister and fell in love with Chen, so they were doomed to be impossible.