Kaori, a wife, has been taking care of her elderly father-in-law, who has become ill and is prone to staying in bed. However, when she looks into it, she finds out that the cause of her father-in-law's poor health is drinking too much! "I'm not going to drink anymore..." he says, but he drinks whenever he finds an opportunity. And to make matters worse, when his usually kind father-in-law drinks, he suddenly turns into a sexually harassing old man! Kaori resists her father-in-law's out-of-control erect cock and obscene tongue, but her body twitches because she is sexually frustrated. Gradually, Kaori falls into her father-in-law's submissive drinking companion...