After their marriage, Xu Tang and Zhou Chengyu lived a stable life, but his parents asked for five hundred thousand to help his younger brother buy a house. Faced with the habitual demands and partiality of their original family, husband Zhou Chengyu broke the inherent concept that 'the eldest brother must pay infinitely,' defending the bottom line of his own small family. Through family conflicts, elders being hospitalized, and other major events, the family slowly reflected on the boundaries of family affection. The younger brother shed his dependence and learned to stand on his own, the elders suddenly realized the importance of fairness, and ultimately the brothers jointly shouldered the responsibility of supporting them. Everyone came to understand that true family affection is not blind sacrifice and perfection, but by guarding boundaries and understanding one another, a family can harvest harmony and warmth.