Marina lives with her husband and college son. - She was living a peaceful life in a blessed family, but it was depriving Marina of the joy of a woman. At that time, I met my son's best friend, Daichi. He often came to the house to play, but it wasn't long before he noticed his piercing gaze as an adolescent. - And one day, Marina accepted her intense desire. Five years later... The relationship continues to this day. Daichi also has a girlfriend. - However, the two of them repeat deeper vaginal shot sexual intercourse.