Shinkon Netorare Seikatsu ~Gomennasai, Anata. Kon'yaku, Kekkon, Shussan, Zutto Watashi wa Oji-san ni...~

Yukino has a boyfriend named Makoto with whom she promised to marry. However, Makoto is a man of good family and they refuse the marriage with Yukino.

Then, Makoto's uncle, Masao, comes up with a deal. He would arrange the things to make the marriage possible if Yukino agrees to spend a night with him.

Yukino hesitantly accepts the condition. However, it's a beginning of a devastating life...

*The wife stolen by a dirty old man.
*Adultery behind the scene of happy wedded life!
*The story is enjoyable from the husband's viewpoint who doesn't notice the cuckoldry.
*Insistent and sticky uncle doesn't mind impregnating her!

[From DLsite English]