Eri, Keigo's wife, lives with her father-in-law, Atsuro, in their parents' home. Eri is a full-time housewife with no children, and she takes care of the cleaning and cooking for Atsuro on the first floor where he lives. Atsuro, who lived alone before moving in with them, outwardly plays the role of an old man with no energy, but in reality he is quite a womanizer. It has become a daily routine for him to peek at Eri's upskirts. Furthermore, Atsuro is no longer satisfied with just upskirts, so he starts secretly filming the couple's bedroom with a hidden camera...