Hiroshi, who stayed at his friend Tetsuya's house, was introduced to his mother, Rei. She boldly showed off her voluptuous body and approached him without any defenses, making it impossible for him to control his excitement. Noticing Hiroshi's gaze, Rei, who had been overwhelmed by her sexual desires due to her husband's long business trip, decided to seduce him. However, he was an unstoppable sex machine who never reached his limit no matter how many times he ejaculated. At first, Rei enjoyed his tireless cock every day. But eventually, her body started to scream from his endless lust.