J-cup busty mother, Sumire Shiratori, has discovered the joy of exercise! Sweat flies from intense exercise, and her clothes get damp... As Sumire Shiratori is tired and resting her body, her son, who is still a student, attacks her! Mother and young son engage in carnivorous sexual acts while grappling with each other! Mother and son realize that sex is healthier than exercise. Forbidden mother-son incest. Two people drown in forbidden love...