“B for Busy” parallel story Single mother Wang Tiemei (played by Song Jia) moves out of work and meets neighbor girl Xiaoye (played by Zhong Chuxi). Xiaoye was sunny on the surface and depressed inside, and the two became close friends. The man surrounding Wang Tiemei: his ex husband (played by Zhao Youting) occasionally causes trouble, and his daughter's drummer teacher (played by Zhang Yu) seems to be full of new possibilities. Facing the intruders of love and life, two foreign women are thinking and growing..