Anyone kind enough to provide a synopsis, not everyday we are blessed with such a good pregnant content without the blue balling curse of last page pregnant belly. Thanks.
Using DeepL to translate the Fanza synopsis: MC has "high pregnancy rate semen" so he ends up working for a sperm bank but instead of donating it he needs to have intercourse with the clients(?). The woman's husband is infertile (azoospermia) but her parents-in-law keep pressuring her into making them a heir so she decides to get impregnated by MC(?). No idea if this is correct, hopefully someone more smart than me can confirm if it is or not. Also does this count as cheating? Because it looks like she's keeping this a secret from her husband.
Basically MC, who has an abnormal body (high pregnancy rate semen, high self healing power(?) ) agreed to work for the semen bank under two conditions: 1. He will provide semen through sex only 2. He gets to pick the customer
Indeed she was cheating since she kept coming back to MC for more sex solely for pleasure, even though she got pregnant the first time. MC's semen prob has some sort of aphrodisiac effect, which made her change her attitude throughout the time.