Kifujin shibari tsubo

A wealthy land-owner "buys" his wife in order to pay off her father's debts. Of course, hubby is into rope-bondage and rough-sex, and wifey ain't. Six months of marriage goes by and the husband's overbearing sister comes for a visit (who it is alluded to has shared a sexual relationship in the past with her brother), and she begins meddling in the couple's relationship when she catches the wife passing messages to a lover via one of the male housekeepers (who is also in love with the wife). (imdb)