Eri, a wife, lives with her husband Keigo's father-in-law Atsuro in his parents' house. Eri is a full-time housewife with no children, and takes care of Atsuro's household, cleaning the first floor and cooking. Before they moved in together, Atsuro lived alone, and on the surface he played the role of an old man with no energy, but in reality he was quite fond of women. It had become a daily routine for him to peek at Eri's upskirts. Furthermore, Atsuro was no longer satisfied with just upskirts, so he began secretly filming the couple's bedroom with a hidden camera...