I came to Tokyo for my university entrance exams and decided to stay with my brother and his wife. My brother and his wife, Jun, don't seem to get along badly, but recently my brother has been coming home late and Jun has been complaining. "When we first got married, we said we'd take a bath together every day." One day, I saw Jun masturbating alone in the bathroom looking lonely, and I couldn't hold back and rushed into the bathroom with my cock throbbing! From that day on, we had sex many times, getting soaked.