In order to make the relationship between family members closer and closer, the beautiful younger sister Tina Yuzuki and her husband visited her older sister and her lustful brother-in-law. As soon as they entered the house, the gestures on the brother-in-law's face revealed the dark plots hidden inside him. He just needed to wait for a good opportunity and he would immediately take action and the result was a perfect success when only his younger sister and he were at home. He pressed her down and used all his strength to rape her, satisfying his animalistic desires despite the poor younger sister's constant screaming and struggling.