Toshiki is addicted to gambling behind his wife's back. Today, he unexpectedly wins a big win in a boat race, and goes to an ultra-luxury soapland to reward himself... but unexpectedly, his wife's mother shows up! ``What are you doing, mother-in-law!?'' ``Toshiki-kun!?... Please, please don't tell everyone!'' Toshiki's mouth opened when he saw his mother-in-law, which he had never imagined. You know... if you'll keep this secret... I'll give you plenty of service. I let myself be enticed by the slender body that I've been interested in for a long time... Her super lewd skills lead me to the climax. ! *Contents vary depending on delivery method