Kiyo Morino, 50-year-old housewife. Married for 25 years to a company employee, she lives with her husband and their two sons. Over the years, her husband's libido gradually declined after turning 45. In contrast, Kiyo's own sexual desire began to grow stronger, leading her to frequently pleasure herself in various ways, alone each day. However, with limited experience and knowledge, her routine eventually became monotonous. Feeling she had reached her limit, Kiyo boldly chose to appear in an adult video. "I've devoted myself to my husband since marriage, so I don't really know much about eroticism, but please take care of me." Elegant and refined in demeanor, how will Kiyo experience and respond to this first act of infidelity?