Mutsumi Matsuoka is 44 years old. She is a mother of one who supports her family by knitting at home. The word "pure" seems to fit her perfectly, and that's because it is. She has lived a life that is almost completely unrelated to erotic things. She was a virgin until she met her husband at the age of 27. She got married the following year, became pregnant, and the couple has had no sexual relations since then. Of course, she has never cheated, and has only had sex five times in total in her life. It's been about 16 years since she last had sex, and before she knew it, she was in her mid-40s, still without having experienced the pleasure of a penis. Driven by the desire to not let her life as a woman end like this, she decided to appear in this film. This nearly virgin wife embarks on her first great adventure in life to discover the joys of being a woman.