Five years have passed since her husband passed away. Yuko has been strict with her son Yuichi, trying to raise him to be a fine elite. However, she is becoming frustrated and stressed over Yuichi's lack of progress in grades... At that time, Yuko is unable to resist the pleasure of the adult toys she confiscated from her son and masturbates. However, she is seen by her son's friend, Yosuke... Exposing her indecent behavior, Yuko's sexual desire is fully unleashed, so she scolds him for peeking and orders him to show her his penis. Then, she starts stroking him...