Chiaki awakens early and heads to her son's room to wake him, only to encounter a shocking sight. His morning wood is even larger than her husband's nighttime erection, and when she touches it, she's stunned by its incredible hardness. Drawn to his massive cock, Chiaki's pussy becomes wet from the morning excitement, and she impulsively retreats to the bathroom to masturbate. Her son notices her actions, and the two gradually become involved in a physical relationship. From then on, Chiaki begins chasing pleasure each morning with her son's erect cock, becoming utterly addicted to their repeated encounters.