Create a highly photorealistic 3:4 vertical fashion portrait of an exceptionally beautiful adult East Asian woman, approximately 21–24 years old, sitting on a narrow industrial metal staircase. She has a fresh, soft and youthful adult beauty: a small oval face, gently rounded cheeks, porcelain-fair skin with natural dewy texture, delicate facial proportions, a slim nose, subtle under-eye fullness and glossy rose-nude lips slightly parted. Her expression is quiet, tender and slightly mysterious as she looks directly upward into the camera. She has a short glossy black bob ending at the jawline, full straight bangs touching her eyebrows and softly curved ends framing her face. Her makeup is refined and fresh: translucent luminous foundation, soft pink blush, cool taupe eye makeup, precise thin eyeliner, long separated lashes and moist natural lips. She wears muted teal-green contact lenses with realistic translucent iris detail, a slight blue-gray undertone and a narrow dark outer ring. Her figure is slender but naturally curvy, with a well-shaped bust, narrow waist, softly rounded hips and long smooth legs. She wears a simple yet fashionable monochrome outfit consisting of only two main layers: a fitted charcoal-black satin mini slip dress with a delicate black lace-trimmed low neckline, and a lightweight oversized black open-knit long cardigan worn completely open. The cardigan is made from fine-gauge yarn with an elegant geometric mesh pattern, dropped shoulders, long semi-transparent sleeves and narrow ribbed cuffs. It drapes fluidly around her body without hiding her waist or legs. Add only a slim dark metallic choker and a few delicate rings. She wears charcoal-gray leg warmers scrunched loosely around her lower calves. Modern Korean dark fashion, understated gothic mood, clean styling, expensive fabrics, youthful and editorial rather than costume-like. COMPOSITION: A descending black metal railing fills the LEFT FOREGROUND, running from the upper-left toward the lower-center. The woman sits immediately BEHIND the railing, on its INNER side, positioned to the IMAGE-RIGHT of the railing. The railing is slightly closer to the camera and overlaps only the far-left edge of her cardigan. The beige stone wall remains on the far-right side and does not touch her body. POSE: She sits sideways on a single stair tread close to the railing, with her hips and both knees pointing toward IMAGE-RIGHT. Both legs bend naturally in the same direction. The knee closest to her upper body is raised higher, while the other bent leg rests one step lower and extends diagonally through the lower foreground. Her two forearms lie parallel across the top of the raised knee, reaching horizontally toward IMAGE-RIGHT. Her hands meet and clasp loosely just beyond the knee. Her shoulders remain low and relaxed, and her torso leans slightly back toward the railing. No crossed legs, no twisted torso, no arms wrapping around the body. The camera is positioned one step above her, looking downward at approximately 35–40 degrees. Show her complete seated figure clearly from head to lower legs. Warm amber stairwell lighting is balanced with a soft frontal fill flash, keeping her face, clothing, arms and legs bright and detailed while the deeper stairs remain atmospheric. Clear eyes, readable black fabric texture, soft warm skin highlights, rich but unclipped shadows, intimate late-night fashion photography, subtle film grain and realistic anatomy. Avoid complicated layered clothing, corset seams, leather shorts, jackets, belts, excessive jewelry, bulky knitwear, old-fashioned cardigans, colorful garments, costume styling, crossed legs, opposite-facing knees, tangled arms, hugging both knees, reversed railing placement, leaning against the wall, dark or hidden subject, mature-looking face, long hair, neon-green eyes, doll-like plastic skin, distorted hands or limbs, text and watermark.