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 long been interested in Ai, 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 off Naoto and his wife for five days, implemented a training plan that he had been dreaming about for years.