As a college student and still a virgin, I was able to live alone, which was my dream. On the day of the move, when he goes to greet people, he finds out that a vulnerable and bewitching married woman, Kana-san, lives in the next room. From that night onwards, it became a daily routine for me to masturbate while listening to Kana's moans coming through the thin walls. A few days later, the conversation turned to muscle training, and I started talking about it as a hobby.