35-year-old housewife Matsuyama Sanae. Introduced by a friend, she began dating her husband five years before marrying him, and this year marks their 10th anniversary. Shy and reserved since youth, Sanae had almost no knowledge or experience regarding sex. Her husband, equally inexperienced, was drawn to her pure and earnest nature. Despite strong chemistry, their sex life had always been limited to missionary position.
"My favorite position? I don't really know much, so I've only ever done missionary... I'm really sorry."
Now, through a new relationship with another man, she gradually gains knowledge and experience, determined to better satisfy her husband—leading her to attempt her first sex with another man.
"I never even knew it was okay to ask about such things. Fifteen years have passed like this... My husband must have watched some AVs by now, so he probably wants to try more things, but he never says anything, maybe out of consideration."
This documentary captures her true feelings and her real-life experience with her first sexual encounter with another man. Witness the authentic, unfiltered reality of a genuine amateur married woman.