The president of a large company, Masahiko, received a certain consultation from a subcontractor, Mukai. - Financial assistance to prevent bankruptcy... Mukai proposed to Masahiko, who was reluctant to shake his head, to marry his daughter, Ai, to Masahiko's only son, Naoto. - Masahiko, who has been interested in Ai for a long time, agrees and plans a certain plan. - Until the ceremony, Masahiko forbids premarital sex and corners Ai's libido. - And Masahiko, who paid off Naoto and his wife for five days as a business trip and was alone with Ai, carried out the training plan he had dreamed of for many years.