As a college student, I'm still a virgin, and I'm going to live alone, which I had longed for. On the day of the move, when I head around for greetings, I find out that a defenseless and bewitching married woman, Kana, lives in the next room. From that night onward, it was my daily routine to masturbate by listening to Kana-san's cry that I heard through the thin wall. A few days later, the story became a topic of muscle training, and when I told him that I was a hobby, Kana-san seemed to want to train her body and gave guidance ...