Even though I'm a university student, I'm still a virgin, and I'm finally living alone, which has been my dream. On the day of my move, I go round to say hello and find out that Kana-san, a defenseless and seductive married woman, lives in the room next door. From that night onwards, it became my daily routine to masturbate to Kana-san's moans, which I could hear through the thin wall. A few days later, we got on the topic of muscle training, and when I told her that it was my hobby, Kana-san also wanted to get in shape, so I offered to teach her...