The president of a large company, Masahiko, received certain consultation from a subcontractor, Mukai. Financial support to prevent bankruptcy … Mukai proposed to Masahiko, who refused 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 makes a certain plan. Until the ceremony, Masahiko forbids premarital sex and suppresses Ai's sexual desires. And Masahiko, who was alone with Ai after paying Naoto and his wife for five days, carried out the training plan he had been dreaming about for years.