The Saejima couple, who have returned to their husband's hometown for a visit, are intrigued by Kaoru's father-in-law and Taro. Kaoru discusses with her husband Ryoichi whether they should live with her father-in-law in the future, to which he replies, "Don't you know?"... At that moment... the lewd father-in-law begins to sow discord between Kaoru and Taro...