My stepfather's wife is teasing me about my stepfather. Please forgive me now...

Eri is a wife who lives with her father-in-law Atsuro at her husband Keigo's family home. Eri, a full-time housewife and no children, also took care of the first floor where Atsuro lives, and was also taking care of her meals. Atsuro, who lived alone before they lived with him, ostensibly played an elderly man who lost energy, but in fact he is quite a woman. It's become a daily routine to peek into Eri's panty shot. Furthermore, Atsuro, who is no longer satisfied with just her panties, begins to secretly film the couple's bedroom with a hidden camera...