After losing every night at pachinko, Murakami decides to call a delivery health girl who specializes in married women to change his mood. The delivery health girl recommended to him is busty, beautiful, and has an incredible figure, and is also very service-oriented, so he has no complaints! It was a big hit, but... Murakami has a strange feeling that he has met her somewhere before. And that is because the delivery health girl is a cold-hearted teacher who looked down on Murakami when he was a student. When Murakami realizes the true identity of the delivery health girl, he sets out to get revenge on his long-standing grudge...