My wife is giving birth next week. However, in this day and age, it was difficult to give birth at home, and the husband and wife were taken care of by her sister-in-law's house who lived near her. Her sister-in-law is kind and beautiful enough for her big brother. …he looked happy. But the reality was different. Her azoospermia was discovered when her sister-in-law, who was not blessed with a child despite her waiting, had her older brother undergo an examination. Witnessing her sister-in-law who was stricken by her despair, I was lustful.

再来週、妻が出産する。しかしこのご時勢、里帰り出産も難しく、近くで暮らす義姉さんの家に夫婦共々お世話になる事になった。義姉さんは優しくて兄貴には勿体ないぐらいの美人。…幸せそうに見えた。だけど現実は違った。待てど暮らせど子宝に恵まれない義姉が兄貴に検査を受けさせたところ無精子症が発覚。絶望に打ちひしがれている義姉さんの姿を目の当たりにした俺はあろう事か欲情してしまい…。