After discovering her husband's infidelity, Miori's relationship with him grew increasingly cold, and their marital life all but disappeared. Although she had hesitated to divorce for the sake of their son, once he left for university and began living on his own, the idea of divorce gradually became more real. Eventually, the couple decided to live apart, and divorce proceedings began. When summer vacation arrived and her son returned home, Miori anxiously waited for him at the station, planning to tell him about the divorce.