Summer, the wife who can't give up on having a child with her husband who became impotent due to an accident. The conclusion reached after repeated discussions between the couple was 'proxy sex with the father-in-law, Kiyoshi.' It was thought that it would be easier to pour love into someone other than a complete stranger... but Kiyoshi regained more vigor than necessary in front of the young and beautiful Summer! What was supposed to end with simple intercourse didn't. 'You must be lonely not being able to do it with him,' Kiyoshi relentlessly pursued Summer's body. Under the pretext of having a child, he shamelessly enjoyed multiple inseminations with his son's wife. Summer also became addicted to sex with her husband-approved father-in-law...
