Masterpiece best quality, 28yo adult female with a toned figure and obsidian hair, wearing the glossy black PVC harness top and gold-studded leather pencil skirt. She is strapped into a medical-style stirrup chair, her legs locked wide open. A polished steel vaginal speculum is inserted and locked open, (forcing the vaginal introitus and vestibule tissue into a wide, circular gap:1.3), exposing the internal vaginal walls and the prominent clitoral glans under tension. She is gripping the armrests of the chair, her back arched, her face showing a mix of vulnerability and intense arousal. The setting is a clean, minimalist white studio with bright, clinical lighting that emphasizes every detail of the stretched anatomy and the gold hardware of her outfit, 8k resolution, ultra-detailed textures, high-fashion fetish aesthetic.