Young yet fully mature married women overflowing with sexual desire. However, their husbands are too exhausted from work to satisfy them. Suffering from daily frustration, these wives seek new excitement and turn their attention to their still-vigorous fathers-in-law. During quiet afternoons when their husbands are away, they secretly meet with their fathers-in-law at home. With expert techniques, the men envelop them in intense pleasure. This fleeting affair gradually leads them to a point of no return, making it impossible to go back to their ordinary married lives.