Zhou Nan, from an ordinary family, hires a boy to pose as her boyfriend to move out of her crowded home. Meanwhile, billionaire CEO Chu Mo hires a fake girlfriend to appease his parents. They meet at a park, mistakenly thinking each other is the hired actor. They start living together, later realizing the mix-up but deciding to continue the charade. Zhou Nan suggests sharing the rent and posts a rental ad, bringing in the cheerful boy Gu Xiaobei, leading to a life filled with ambiguous feelings under one roof.
