even though i'm a college student, i'm still a virgin, and i'm finally going to live alone. on moving day, when i went around to greet the neighbors, i found out that kana-san, a defenseless and enchanting married woman, lived in the next room. from that night on, i made it my daily routine to masturbate while listening to kana-san's moans through the thin walls. a few days later, the topic of muscle training came up in the conversation, and when i told her that it was my hobby, kana-san also seemed to want to train her body, so i ended up teaching her...