Ayaeko (38) has been married to her husband for nearly three years, having tied the knot with a longtime friend. Initially, they shared identical tastes in hobbies, food, and lifestyle, leaving her with no complaints. However, after marriage, their sexual frequency began to decline steadily. Both grew reluctant to enjoy intimacy, becoming lazy and indifferent in bed. With unsatisfying sex losing its appeal, and anxious about her age despite wanting children, she desperately wishes to rekindle her husband's affection. Fully aware it's an act of betrayal, the married woman resolves to embark on a journey—a fleeting taboo trip to reclaim what was lost.