Sawami is an office lady working for a well-known cosmetics company in Tokyo, excelling in her career. She's currently in a relationship with a man who recently proposed to her. While this should be a joyful occasion, she harbors one major concern—she is his first ever girlfriend, and he is still a virgin. Their relationship has now hit a serious obstacle in the bedroom. His sexual performance fails to arouse her, and lately, she's even begun to feel mild disgust. Despite this, he remains intensely eager, constantly pressing her for sex whenever they meet. When she confided in her best friend, she was told, "If your physical compatibility is this poor, can you really be happy married?" Yet outside the bedroom, she has no complaints about him. Because she's only ever been with one man, she can't tell whether she dislikes sex itself or if he's simply inexperienced. Her friend then suggested she try appearing in an AV to find out the truth, and Sawami decided to take on the challenge. Watch as this inexperienced, hesitant amateur woman is taken by a male actor and experiences sex for the first time—witness the moment she transforms from a nervous beginner into a real woman.