FANZA: https://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_629917/
DLsite: https://www.dlsite.com/maniax/announce/=/product_id/RJ01427252.html

P.1-64: 通常バージョン
P.65-128: 腋毛なし

To combat the declining birthrates Hikari Sonoda enrolled in a goverment funded surrogate pregnancy program for couples who have been married for at least five years, but still don't have children for any reason, hers is because her husband isn't good at sex, being a premature ejaculator and has a small penis (none of this prevents conception IRL btw, it's hentai logic). After a year waiting period Hikari gets her designated surrogate pregnancy doctor who will work hard to give her a baby, Mr. Umatami, and they even provide assistance for educating husbands on performing better at sex, how nice.

Umatami works Hikari pretty hard, while her husband at first asks how well the program is going, she doesn't give much details, just saying it is going fine; in reality, Hikari of course is being taken body and mind by Umatami, to a point where her husband invites her to go out and have a nice day at the beach after he took a break, but his nice gesture is rejected because Hikari says that day is one during one of Umatami's scheduled program, can't miss it since he has a full agenda after all.

The big day, however, has Hikari's certain conception being live streamed to her husband as part of the program for the betterment of their relationship, teaching him how to perform is part of it as once informed.

Hikari has been successfully impregnated by Umatami, months later Hikari is having sex with her husband and she feels he has gotten a little better, not enough for her liking but she loves him so that's ok; luckly the program offers after-care visits to ensure the costumers are satisfied, Umatami has sex with Hikari right in front of her husband, he watches attentively to learn as much as possible.

Hikari is ecstatic, hoping to renew her program so she can more children soon.

--------------------------------------------------------------------------------

if they offer lessons to perform better on bed, can't they let him impregnate his own wife first if he is not explicitly infertile? ....hentai logic of course.

So the narrative leans towards netorare for the most the part, leaning towards netorase by the end.

Base +9, STAR-KNIGHT +6, throwaway2112 +6, stayambiguous +6, Fofotron +26, kemohun04 +6, anonymousMember +6, nuts987 +14, ADIN0 +10, RapidBlast +6

These stories particularly the sex program ones, tend to be really stupid or force you to suspend your disbelief harder otherwise it doesn't work

Base +8, Ensei Sohryu +6

That USA bikini on page 43 is perfection.

Base +12, Asarta +6, Raiya95 -14

The wife went from being neat to a filthy whore ha ha

Base +7