Honami and her husband have moved to take care of their father-in-law who has dementia. However, the couple's relationship is cold, and Honami completely forgot to smile while taking care of her unrelated father-in-law. The only salvation was that the doctor, Kono, who was once an affair partner when he was working at the hospital, came to visit him, and the two of them hid from their father-in-law and violently sought each other's bodies. However, my father-in-law witnessed the lust on the other side of the fusuma. What's more, even Shimoyanagi, a caregiver who is in love with Honami, finds out about it...