Koji, a lowly salaryman who never seems to get ahead, had a rare big win at the horse races today and decided to treat himself to an ultra-luxurious soapland... only to find his mother-in-law there!! "Oh, mother-in-law!?" "Koji!?... Please! Keep it a secret from everyone!" Forgetting his own situation of betraying his wife by indulging, Koji was shocked to see a side of his mother-in-law he never knew... "Hey, coming to a place like this... isn't something that girl would do, right? If you keep it a secret, I'll give you incredible service..." Despite being his mother-in-law, he had always been intrigued by her incredibly voluptuous body. Giving in to the temptation, he let himself be led... and was soon enveloped by an unexperienced, super intense flesh technique!!
