(masterpiece, best quality, ultra-detailed, photorealistic, 8k), full body portrait of a stunningly beautiful 19-year-old girl with a slender, toned body and flat stomach. She has captivating light blue eyes, fair skin, and light brown hair tied up in a messy high ponytail with loose strands framing her face. She has a mischievous, seductive smile and is looking directly at the camera. She is wearing a tight grey long-sleeve crop top that is pulled up high to create an extreme underboob, fully exposing her delicate, sheer white lace underwire bra. She is wearing a very short, dark grey and blue plaid pleated miniskirt. With both hands, she is lifting the hem of her skirt, provocatively revealing her matching sheer white lace panties which clearly show the outline of her shaved mons pubis and vulva underneath. She wears a black leather choker with a small silver ring. The setting is a classic, cozy library with large, dark wood bookshelves filled with books in the background. The lighting is soft and warm, creating an intimate and cinematic atmosphere. Sharp focus on the girl, soft focus on the background.