Masahiko, the president of a large company, received a consultation from a subcontractor, Mukai. Financial assistance to prevent bankruptcy... What Mukai proposed to Masahiko, who did not shake his head, was the marriage of his daughter, Ai, and Masahiko's only son, Naoto. Masahiko, who has been interested in Ai for a long time, agrees and at the same time plans a plan. Until the ceremony, Masahiko forbids premarital sex and hunts down Ai's sexual desire. And Masahiko, who was alone with Ai by paying Naoto and his wife for 5 days on a business trip, carried out the training plan that he had dreamed of for many years.