In "Harmony - Slam It In Deeper," Katsuni stars as a woman on a mission to satisfy her deepest desires. She's not afraid to take charge, guiding her partners to give her exactly what she wants - hard, deep penetration. The movie is a sensory feast, filled with the sounds of flesh slapping against flesh, the sight of Katsuni's perfect body in various states of undress, and the explicit, graphic details of her sexual encounters. It's a kinky, lewd exploration of one woman's unapologetic appetite for intense, explicit sex.