Mutsumi Matsuoka, 44 years old. A single mother who supports her family through knitting side jobs. The word 'pure' fits her perfectly, and for good reason. She has lived a life almost entirely devoid of anything erotic. She met her husband at 27, still a virgin. They married the following year, and after getting pregnant, their marital relations ceased altogether. Naturally, she has no experience with infidelity, and her total number of sexual encounters in life is a mere five times. Before she knew it, 16 years had passed without any sexual pleasure, and she was already halfway through her 40s. Driven by the thought that she doesn't want to end her life as a woman this way, she decided to make her debut. A nearly virgin housewife embarks on her first major adventure in life to experience female ecstasy.
