Maki Ei, who raised her son Tomoki alone after the death of her husband, has seen Tomoki grow into a fine young man and has remarried Kenichi. Despite doting on Tomoki and being a devoted mother for a long time, her body regains the pleasure of being a woman through her new husband's persistent sex. However, Tomoki had been secretly watching Maki Ei... and as he began to see her not just as a mother but as a woman, the intense urge to "want to have sex with Mom" became unbearable...
