義父が出張で、家に泊まりに来ることになり、受け入れることになった一組の夫婦。しかし、旦那とは違う男前な義父に惹かれていた人妻「なお」は我慢出来ず誘惑し不倫してしまう。そして旦那とは違う老練テクでイキ狂い義父の虜になっていく人妻…。この一家の行く末は果たして…。A couple accepts their father-in-law's invitation to stay at their house when he goes on a business trip. However, "Nao," a married woman who was attracted to her father-in-law, who was different from her husband, couldn't resist seducing him and having an affair with him. The wife becomes a captive of her father-in-law, who is a master at using different techniques from her husband… What will become of this family?
