A couple had been trying to conceive but were unsuccessful due to their daughter being infertile. After much deliberation, they decided that the mother, Emi, would carry their child. One night, Emi noticed her daughter and son-in-law staring at her with strange expressions. They presented her with an infertility diagnosis. Feeling awkward, Emi could only nod in understanding when her daughter asked her to bear their child. Seeing her daughter so distraught was heartbreaking for Emi. Several days later, after calculating her fertility window, she finally conceived. As her husband watched over her, both nervous yet excited, they successfully consummated their relationship. Despite their initial tension, his seed found its way inside her womb. Nine months later, Emi gave birth to a healthy baby boy. Alongside this joyous event came another unexpected change - Emi began experiencing newfound femininity within herself...

子作りに励んでいたがなかなか授からず、検査した所、娘はいわゆる不妊だった。順風満帆な娘夫婦に突きつけられた悲しい現実。娘夫婦は悩みに悩んだ末、ある結論へ到達した。ある夜、娘夫婦は神妙な顔つきで母映美を見つめていた。手元には不妊の診断書。突然の事に狼狽する映美に、娘はこう言った。私の子供をお母さんが産んでください、と。愛する娘の悲しい顔は見たくないと、映美は分かったと頷くしかなかった。それから数日後、映美の妊娠可能日を調べ、遂にその日を迎える。娘に見守られながら、娘婿と行為する。互いに緊張していたが、無事映美の中に婿の精が放出された。そして数ヶ月後。無事着床し、映美のなかで確実に育っている子供。その成長に合わせるかのように、映美のなかの女も又目覚め始め…。