Rika lives an ordinary married life. One day, her husband's brother drops by. Her husband and brother don't get along very well, and Rika is fed up with her husband, who always fights over trivial things. Compared to her childish husband, Rika is attracted to her brother-in-law's generosity, but he suddenly changes and attacks her. Rika squirts as he caresses her, which is different from how he caresses her with his husband. She kneads her big breasts, shakes her hips, and begs for his cock, climaxing violently and spasming over and over again.