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 there might be a change if my son got married, so I forced Nao, the daughter of the subcontractor company manager, to meet my son by calling me a matchmaking. 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 I sent my son to a five-day business trip, I put Nao's training plan into action.