At 41 years old, Miki works as an office lady in the secretary department, having served for six years before marrying and leaving her job to become a full-time housewife. She has one child with her husband, and despite pregnancy and childbirth, her figure remains as slim and toned as it was in her twenties. However, she has been in a sexless marriage for five years. Feeling her body's unfulfilled desires reaching their limit, Miki decides to surrender herself to fleeting sexual encounters in search of the pleasure she's been missing as a woman. Along the way, she meets four other partners, each encounter fueling her passion even further.