While her husband is away on a company year-end party trip, the naughty aunt Sawako seduces her nephew, who has come to visit for the first time in a while, and plays with the young man's ulterior motives... The nephew is confused by the mature woman's seductive seduction, but he is aroused by her seductive gaze, mature woman's mannerisms, soft, voluptuous breasts with large areolas, and slightly loosened ass, and he becomes captivated by the charms of the mature woman's body. Sawako is impressed by the erectile power of her nephew's young cock, which her exhausted husband does not have, and she demands sex over and over again, writhing and climaxing over and over again.