Netorare Byou ~Ai Suru Tsuma ga Ore Igai no Otoko ni Nakadashi Sarenai to Tasukaranai Kibyou ni Nattara~

My darling wife Chihiro was stricken with a sickness that had no treatment, except one: the creampie ejaculations up her beloved vagina by someone other than me, Shiro, her husband.
Watching her make love with strangers, it was a cure worse than the disease.

We were so happy when we married, and then one day she suddenly collapsed.
I wasn't a compatible donor. She needed the hot spunk of someone else, or she would die.
It was for her life. A pleasure prison, a violent fear. These were our hellish days...

[From DLsite English]