他の男の精液で孕むとき～襖の向こうで弟に精液を注ぎ込まれている妻～（Hoka no Otoko no Seieki de Haramu Toki ~Fusuma no Mukou de Otouto no Seieki o Sosogikomareteiru Tsuma~）

My wife always longed for a child, but I can't give her that. The problem lies in my body - infertile seed. I'm desperate with no options left...

What if I ask my brother for a favor?