After losing her husband, Makie raised her son Tomoki on her own. After seeing Tomoki grow up to be a fine young man, she remarried Kenichi. She doted on Tomoki and was devoted to being his mother for a long time, but her body regained the joy of being a woman through persistent sex with her new husband. However, Tomoki was secretly peeking at Makie's behavior... And, Tomoki, who was conscious of Makie not only as a mother but also as a woman, could no longer suppress the strong urge to "have sex with my mother"...