"Buying a house" is the dream of every Hong Konger. However, even if a family with an income around the median does not eat or drink, it will take 20.9 years to buy a house. The difficulty of "buying a house" is world-class. If you "get on the wrong bus", you will lose your house and regret it forever. Middle-class families will "go downhill"... Che Zhiming and his wife sold their house in 2008 to "cash out", thinking that the house price would fall to the bottom within half a year, but unexpectedly it did not fall but rose instead. The dream of buying a private house was shattered, and the only choice was to switch to Home Ownership Scheme Scheme, but unfortunately it was only a chance to pick houses. Ming was distressed because he had no time to "buy a house", and he was even more angry when he saw the person he hated most in his life, Min Xie Yuxia, living in a public housing with sea views. Ming tried hard to persuade Xia to add his family to Xia's public housing list, and then exchange the public housing for Home Ownership Scheme Scheme, but who knew that plans could not keep up with changes... Ming was a regular customer of real estate agent Gao Rong. Ming introduced his eldest daughter Qianqian to be Rong's assistant. After Qian became a real estate assistant, she saw all kinds of buyers. Rong sees "getting on the bus" as a necessary stage in life. Qian also wants to get on the bus, so they get married in a fake way and apply for a Home Ownership Scheme (HOS) flat together. Fortunately, they are successful in the lottery. Rong moves into a HOS flat to save on rent, but unexpectedly, Qian's family is forced to move out and they have to move in together. The two people who are in a fake marriage have to face the real life of living together...