Kanna's husband has been working away from home for the past two years, and now Kanna lives with her daughter and son-in-law. One day, when her son-in-law Ichiro was drunk and mistook her for her daughter, she was Kokoro by his enormous cock. Since then, she has been captivated by his huge cock, telling herself that she is doing it for her daughter and son-in-law, and openly seduces Ichiro at every opportunity, day and night. Unable to resist the seductive charms of his mother-in-law, who will stop at nothing to get what she wants, the frustrated son-in-law has his semen milked by her again and again...