One day, her husband's older brother, Katsuhiko, who loves gambling and does not get a regular job under a married woman, Kanae, who is on a business trip abroad, came to ask for money. Kanae was stopped from lending money by her husband saying "it's not good for her brother". Katsuhiko knows that he can't borrow it! Katsuhiko, who had been lustful for Kanae for some time, attacked her just at this time ...