The chairman of a famous company, Tabuchi, is having a hard time with his virgin son, who is approaching the age of 30. I thought that even such a son would change if I got married, so I used my power to force Nao, the daughter of the subcontractor company manager, to meet her son. However, in reality, Tabuchi was plotting to make Nao his own. Tabuchi, who hastily proceeded with marriage proposals, pretended to be a strict father, and forbade premarital sex. And on the day he sent his son on a five-day business trip, Nao's training plan was put into action.