The Hoshino couple run an inn in a certain hot spring resort. However, due to the recession, the number of customers has decreased and the business is in dire straits. Furthermore, Saji, a man who has been working as a servant at the inn since the previous owner's generation, has a bad attitude at work, which is a big problem for the couple. One day, Ishigami, a loan shark from whom Saji had borrowed money, comes to pressure him to repay the money. In a panic, Saji comes up with the worst idea: to offer the body of Natsutsuki, a beautiful woman of marriageable age with big breasts.