An unexpected event suddenly disrupts Nao's daily life—her husband's older brother, long estranged and out of contact, shows up. Having lost his job, the brother comes seeking financial help, but Nao's husband coldly rejects him. Harboring deep resentment, the husband cannot forgive his brother-in-law for abandoning the family before their parents passed away. Amid this tense situation, Nao finds herself unable to ignore her brother-in-law, and her emotions and actions begin to intertwine. A heartbreaking story unfolds, depicting familial conflict and the complexities of human relationships.