姉妹妻牝贄不妊恥療～肉棒注射で白濁液を投薬だ！

Tomohiko was busy at work in his personal laboratory,
as usual researching and experimenting to find a way to reverse female infertility.

One day his older brother's wife Nao came to visit.
It was unusual for anyone to come here, and she also was not forthcoming about the reason. Finally she explained that she and her husband were having trouble getting pregnant. Was there anything he could do?