Fine Art B&W Swimwear Studio Portrait

Ultra-realistic black-and-white high-end studio swimwear photography, a woman in her 20s, East Asian, standing in front of a pure black seamless background, vertical composition, 2:3 aspect ratio, medium to thigh shot, subject centered, occupying about 70% of the frame. She faces three-quarters to the left, waist slightly twisted, looking back at the camera. Both arms raised above her head, one hand gently holding the opposite wrist or fingers, forming an elegant curve. Shoulders relaxed, back, waist, and legs forming a continuous smooth S-curve. Expression calm, confident, slightly aloof, lips naturally parted. She has a delicate oval face, clear jawline, dark almond eyes, slender straight nose, naturally full lips. Makeup suitable for B&W photography: sheer base, gray-brown eyeshadow, fine eyeliner, natural lashes, subtle lip tint. Long, thick, dark hair naturally falling to mid-back, side-parted, with slight waves, individual strands visible. She wears a minimalist triangle bikini, thin straps/halter neck, top and low-rise bottoms with fine leopard or abstract animal print, edges trimmed with very thin solid color piping. Back secured by thin ties, natural knots and hanging strings visible at the center back and waist sides. Bikini fits realistically, not exaggerating bust, waist, or hips, no high-waist or heavy fabric. No logos, no text, no accessories. Background completely pure black, no environmental elements. Use classic studio lighting with soft key light: main light from front-left slightly above, softly sculpting face, shoulders, arms, waist, and legs; very faint rim light from back-right outlining hair and body silhouette. Strong but subtle chiaroscuro between black background and bright skin. Shoulder blades, spine, lower back, and glutes/legs retain realistic natural highlights and shadows, no over-sculpting. Overall pure black-and-white or neutral silver-gray tone, high contrast but with rich mid-tones. Skin tone soft porcelain gray with silver highlights, black hair and background deep black. Use 85mm or 105mm portrait lens, f/2.8-4, ISO 100-200, 1/200s, medium depth of field. Eyes, face, hair strands, bikini texture, and body contours sharp. Retain realistic skin pores, natural skin tone shading, shoulder blades, lower back, arms, leg structure, and individual hair strands. Add very subtle silver halide film grain, soft highlight glow, and natural vignette. Avoid plastic skin, over-smoothing, CG look, HDR, over-sharpening, extreme thin waist, exaggerated buttocks, incorrect spine, deformed fingers, incorrect bikini structure, or extra limbs. Overall style: high-end black-and-white fashion magazine, fine art swimwear photography, minimalist studio editorial portrait, cool, restrained, mature, sculptural, naturally sensual. No text, no logo, no watermark, no other people.