S1 debut beauty Rei Kuroshima takes on bondage for the first time under Kai, a master director of the genre. Orphaned at a young age, heiress Rei relies on her servant Sagawa for everything from laundry and cleaning to massages—and even the satisfaction of her desires. When she begs him to bind her tightly, she gradually becomes intoxicated by the pleasure of the ropes. The beautiful heiress writhes in a dark, perverse world of BDSM bondage training before sinking into deep orgasms.