Wasaki has been married for two years. She started living with her father-in-law Tadao six months ago, but one day, Tadao fell into bed with a strained back. After that, every time he was touched by Wasaki, who was assisting him, Tadao unconsciously got an erection, which had not happened since his wife passed away. Wasaki, who has no sex with her husband, can't take her eyes off her father-in-law's crotch, and finally, in the name of caring for her, he overlaps her body... The secret frustrations of two people who intersect. In the afternoons when her husband was not around, the tips of our tongues intertwined passionately were repeated...