Former president's secretary Kanna married an older male executive. Although she is a stepmother by marriage, she cares for and takes good care of her adult son who still lives at home and doesn't go out. One day, wanting to encourage her son, the stepmother gives him a massage. But as she rubs, it unexpectedly grows bigger and harder, becoming quite impressive. The stepmother is confused but unconsciously gets wet. The excited son begs her to help him...!
