Aika has been married for a year and recently started living with her father-in-law, but she can't bring herself to like him because he's still a dirty old man who thinks he's hot. One day, her husband goes on a business trip and she is left alone with her father-in-law, who makes her drink an aphrodisiac mixed into her tea. Even though she hates it and it pisses her off, she ends up cumming over and over again with his dick. From then on, he keeps clinging to her, and her body gets more and more turned on by his sticky, lewd caresses, and she can't get the aphrodisiac and her father-in-law's dick out of her head. No matter how much she hates him or finds him disgusting, once she experiences that pleasure, it's all over...