https://www.dlsite.com/maniax/work/=/product_id/RJ01638436.html
https://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_757207/

Ryota is a bonafide Elite of a man, he is handsome, well placed as the section manager at his workplace, his subordinates respect him; Ryota is very much proud of himself, and to top it all he has a beautiful wife waiting him at home, Sayuri.

However, this Elite man isn't very caring at home, Ryota is very stubborn, acting like his role as a husband is to provide and Sayuri's role is to serve him, and of course provide Ryota with a heir but that has become an issue, Sayuri hasn't gotten pregnant despite their efforts, very dull efforts at that, their sex life is for the sole purpose of pregnancy has Ryota completely uninterested in pleasing Sayuri, but she does as told, extracting Ryota's seed like a dutiful wife.

No luck, Sayuri still hasn't gotten pregnant, and of course a stubborn man like Ryota thinks the fault lies with Sayuri so at first she went alone to a doctor to go through some checks, the doctor went through everything and is confident that Sayuri is absolutely normal, her fertility rate should have her pregnant pretty easily then surely the issues lie with Ryota, but a man of his pride would never accept this so Sayuri doesn't tell him what the doctor said to her, she just manages to talk Ryota into going into a joint procedure, as if prepare both of them for a guaranteed pregnancy, Ryota goes but pays no mind to the details...

Another day Sayuri feeds her grumpy husband like a good submissive wife, but Ryota feels a little drowsy so asks what Sayuri put in that bowl, why yes, it is just medicine the doctor prescribed with that Ryota falls asleep... only to wake up in shock, what!? Ryota has become a woman, how did that happen? Sayuri is just calmly there, as if she expected this to happen, she simply tells Ryota this is all part of the fertility treatment, see? The good doc prescribed a experimental procedure for both with no upper charge, they only need to properly record the effects and results of the procedure at home.

What? Ryota angrily notes how he is supposed to impregnate Sayuri now that he is a woman? Oh but Sayuri knows how, see this penis, SHE will the one to impregnate him! Ryota can't believe this is happening, did he really miss the finer details of that interview? It seems so because Sayuri says this was all laid by the doctor; a pent up wife who has only been treated like an object by her husband now hungers to be in a position of power, Sayuri will make Ryota be at ease, she knows how a woman's body works after all, all the corners she wanted Ryota to explore on her but he never bothered to before.

Ryota is absolutely ashamed, he was so prideful, he really took his position as a man of the elite very seriously, becoming a woman at the mercy of pleasure is shattering his sense of self, Sayuri on the other hand isn't cruel, she hasn't gotten to the point where she hated her husband, she just wanted to make him feel her frustrations so Sayuri propose they stop, this didn't work after all, let's just communicate this to the doctor and give back the medicine, Sayuri apologizes... this makes Ryota feel something, becoming a woman has made him more sensible, realizing he never really paid attention to Sayuri's opinions before.

Ryota caves in to Sayuri's kindness, no, let's keep doing it, he tries to play tough in that they accepted to be part of this experiment so it is only right to go all the way... oh dear, this makes Sayuri think Ryota is quite cute, looks like her male parts is influencing her desires too, thus this reversed role couple go all the way, very successfully at that, Ryota completely let it go of his sense of self as man, the things he is experiencing as a woman is just too great, it ends with Ryota outright begging Sayuri to impregnate him, please let him bear her child, yes Sayuri is so happy to do just that, let's have a healthy baby together!

Several years have passed, Sayuri is saying goodbye to her little daughter as she goes to sleep at grandma's house, back home Sayuri tells their daughter went to mother-in-law's home already, but what is this? Ryota is already ready? Yes, he already took his pills, Sayuri is so happy to see a cute and eager husband-wife, yes she is raring to go to now that they are alone for the the time being, let's go to the master bedroom, THE END.
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Well that's quite wild. Other works would probably have a frustrated wife being piled with the duty of having a child run to another man's arms, but this gender bend work is too enlightened for that, just make the husband into a wife and wife into a husband, everyone is happy, a marriage has been saved, hurray!

Base +22, NewhalfIsMale +11, october +6, fazer97 +6, Gosei +7