48-year-old Miki Hanayama. A full-time housewife married for 25 years, mother of two sons. Her days are filled with her children's laughter and household chores, but gradually, a sense of loneliness has begun to grow within her. With little interaction with men and no one to play with her kids, she's started to feel a quiet longing for the excitement of male companionship. This led her to participate after being approached during a shopping trip. In fact, she once had an affair after being picked up years ago, and though she's carried guilt ever since, she's secretly wished to experience that thrill again. Her words carried both shyness and an even stronger curiosity. Now, she confronts her true feelings and faces the most embarrassing moment of her life—one that will ultimately lead her to the greatest pleasure she's ever known.