Big-titted beauty Miyanishi Hikaru experiences bondage for the first time under renowned rope director Kai. In the story, orphaned heiress Hikaru relies on servant Sagawa for cleaning, laundry, massage, and even her sexual desires. She begs him to bind her tightly and gradually becomes intoxicated by the sensation. The beautiful heiress writhes through a dark, perverse world of BDSM rope training before sinking into deep orgasms.