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 was alone with Ai after paying off Naoto and his wife for five days, carried out his long-dreamed training plan...