Nao, a popular hostess, has gotten married and lives with her impotent husband and her father-in-law, who requires nursing care. However, Nao's past is a secret from her strict father-in-law, who hates the nightlife industry. One day, after learning of Nao's past, her father-in-law begins to insult and sexually harass her, and even forces her into a physical relationship. Nao is confused, but she soon becomes captivated by her father-in-law's powerful cock, which is different from that of her impotent husband.