Minami lives happily with her beloved husband and daughter and her husband, but her night life is not so good, and it has become a habit to vent by masturbating every night. And it was the same with her son-in-law, Tsuyoshi, who spent her days peeking at her and comforting herself. Minami, who was fascinated by his big, continues to disturb and seduce his heart every time. The son-in-law couldn't resist such a mother-in-law's invitation, and before he knew it, the two devoured pleasure day and night.