Hitomi has been married for several years but continued working at her company. One day, her husband's company collapses after granting an unsecured 500 million yen loan under orders from his superior, resulting in a bounced check and exposure of a planned bankruptcy. Unless he recovers the 500 million yen, he will be transferred indefinitely to a remote island branch. With the mastermind and the hidden account holding the 500 million yen still unknown, Hitomi agrees to surrender her anal virginity in exchange for crucial evidence. Her race against time begins.