Toshio, who lives with his son and his wife, has only one problem. He secretly feels excited when he hears the sound of the couple having sex from time to time... Toshio keeps his distance so as not to arouse any strange feelings, but he senses his manly arousal when his daughter- in-Tsubasa approaches him defenselessly, and he pushes her down without thinking. Tsubasa is unable to suppress the throbbing in her body and is swept away by the intense and greedy acts that her husband does not have. Having gotten a taste for it, Toshio continues to violate her over and over, and before he knows it, she begins to accept it too...