In place of her seedless husband...Mio Ichijo, the son's wife who seeks her father-in-law's sperm over and over again until she becomes pregnant
Mio has been loved by university professor Sugiura for many years in his economics seminar. Thanks to Sugiura's guidance, he rose to the rank of associate professor. At that time, Sugiura's wife passed away, and at her funeral, he met and married her son, Yuuji. She is currently taking a leave of absence from university to try to get pregnant. He is trying hard to conceive, but there are no symptoms, so when he sends his husband's sperm for a test, it is discovered that he has azoospermia. At that moment, Sugiura, his beloved mentor and father-in-law, flashes through his mind. The physical relationship with Sugiura that she had fantasized about many times, and now that bad fantasy has become a reality.