Every Time My Husband Leaves for Business, His Younger Brother Knocks on My Door

The story follows Lin Wei, a young woman who married into the prestigious and wealthy Gu family. Her husband, Gu Chen, is the “perfect” choice on paper—handsome, successful, and polite. However, their marriage is a hollow shell. Gu Chen is emotionally distant, frequently away on “business trips,” and the couple has never shared true physical or emotional intimacy.

The Catalyst: Lin Wei’s life changes when her husband’s younger brother, Gu Jinzhi (the “Little Uncle”), returns from abroad. Unlike the cold and refined husband, Gu Jinzhi is assertive, dark, and observant. He immediately notices the frustration and loneliness Lin Wei hides behind her “perfect daughter-in-law” persona.

The Conflict: The elements of the novel begin when Gu Jinzhi starts a psychological and physical game of seduction. He doesn’t just want an affair; he wants to dismantle the marriage entirely. He uses the proximity of living under the same roof to corner Lin Wei in shared family spaces—the kitchen, the study, and even behind doors while the husband is in the next room.

The Twist: As the affair deepens, Lin Wei discovers a dark secret: her husband, Gu Chen, didn’t marry her out of love, but as a “cover” for his own hidden life (often implied to be his own secret affairs or a lack of interest in women). Even more shocking, she learns that Gu Jinzhi has been obsessed with her since before the marriage. He intentionally stayed away to let her see how “perfect” his brother was, waiting for the marriage to fail so he could swoop in and claim her.