"Stop! What are you doing!" Tatsuya paid no attention to Eiko's desperate resistance, stripping her off and thrusting his cock into her. What motivated Tatsuya was the sight of Eiko masturbating, which he had accidentally witnessed when he had come to visit a few days earlier. Eiko, the mother of his friend whom he had admired since childhood, was sexually frustrated. So he thought he should comfort her! Eiko's erotic and seductive masturbation drove the young Tatsuya crazy.