In order for the relationship between family members to become closer and closer, the beautiful sister Tina Yuzuki and her husband visited their lewd sister and brother-in-law. As soon as he entered the house, the gestures on his brother-in-law's face showed the dark plots hidden inside him. Just wait for a good opportunity and he will immediately take action and the result was a great success when only his sister and he were at home. He pressed her down and used all his strength to rape her, satisfying his animalistic desires even though his poor sister continuously screamed and struggled.