When her elderly father-in-law falls ill, Kana ends up taking care of him. Her father-in-law gradually recovers, but at the same time, his lower body also starts to recover. Her father-in-law makes obscene demands on Kana, causing her a lot of trouble. However, while Kana is sexually harassed by her father-in-law, her pussy starts to throb. She eventually begins to desire her father-in-law's cock herself...