My sister-in-law is in deep humiliation. She has become my perverted pet. Nagano Tsukasa

The elder brother worked away from home and lived with his younger brother's wife. One day, he discovered that his younger brother's wife was having an affair. The elder brother noticed his younger sister's sexy body and perverted behavior, and began to play with her body on the condition that his sister would not reveal the truth about their relationship. The married woman began to indulge in pleasures and perverted behaviors that she had never experienced before...
An older brother lives with his younger brother and his wife while he is away on a business trip. One day, he finds out that his younger brother's wife is having an affair. Noticing her erotic body and perverted nature, the older brother plays with her body on the condition that she won't tell anyone about the affair. The wife becomes addicted to the pleasures and perverted play she has never experienced before...