My wife has a very beautiful sister who has just come up from the countryside. She has a slim body, big breasts and a toned buttocks, I was fascinated from the first time we met. Maybe Takanashi doesn't have a lover yet, because during my time here, I always accidentally saw him masturbate many times. Even though I have a wife, standing in front of such an immature body, I can't help but have a desire. When she was masturbating, I broke in and caught her and threatened her to spoil me, otherwise I would have told this to many other people. Although she was scared and knew that it was against morality, in the face of the threat and still in a hurry, she agreed immediately.