A single-mother family with one child. Reiko has been working to raise her son, forgetting that she is a woman. However, now that the hard work is being rewarded, the desire that has been suppressed overflows due to the loosening of the tense heart. The trigger was that my son's hand that was rubbing my shoulder touched my nipple. - As a reaction to her abstinence life, she awakened to a super sensitive constitution that immediately came just by touching her nipples. Reiko impulsively crosses the forbidden line with her son, and the next day she exposes her breasts and heads to the company without a bra.