Kenjiro, the eldest son of the strict head of the Yurikawa family, Toshiyuki, was dominated by his wife Sara. When Kenjiro found out, he was furious and ordered his son to rape his wife in front of him. While his son was confused, Kenjiro caressed Sara and made her climax with his skilled tongue skills. From then on, Sara was tasked with taking care of Kenjiro's private parts under the pretense of caring for him...