A son who used to watch his mother bathe. The mother had noticed her son's gaze for some time. One day, she called her son into the bath, saying, ``Come in so I can wash you,'' to her son who was peeking in as usual. There, the mother can't hold back her excitement when she sees her son's grown-up body, and the son can't contain his excitement at the sight of his mother's seductive appearance. And then, the mother saw the crotch of her son...