Retrato de espaldas ultrarealista con ambiente de los 90

Create an ultra-realistic portrait of a young woman, keeping the facial identity 100% identical to the original reference. The face must remain completely unchanged with no facial modification or beautification. Facial accuracy is the highest priority. She has fair white skin with a soft pink undertone, smooth refined texture, glowing and dewy. Her body features a full bust and a slim, defined waist. Fingers are long and slender with beautiful gel nail art. Makeup is in a Douyin / Korean style: large sparkling eyes, long curled lashes, strong pink blush across the cheeks and nose bridge, and juicy glossy lips in a pink tone, with an optional bright red lip color variation. She wears a black Harley-Davidson t-shirt with an eagle graphic and long blue jeans, accessorized with black square sunglasses and a gold watch. Hair is black, styled in a high ponytail. Pose: a turn-back pose, body facing away while twisting back toward the camera, one hand in the pocket. Expression is cool, calm, and confident, looking at the camera through the sunglasses. Mood and style: vintage 90s vibe, cool attitude, with bold and vibrant colors. Scene: set in front of a Japanese restaurant or a wall covered with colorful vintage posters. Camera: medium shot, eye-level angle, shot with a strong flash.