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[Subject] One anime-style retro pin-up young woman shown from the chest up against a plain warm cream background. She has short voluminous glossy black hair styled in a curled vintage bob, side-swept bangs, softly arched brows, large warm brown-grey anime eyes with dramatic lashes, pink blush, a tiny beauty mark near one cheek, a small nose, and glossy pink lips slightly parted. Her expression is sweet, flirtatious, and elegant. She wears oversized black bow-shaped cat-ear or ribbon-like head accessories positioned symmetrically on top of the head. Small stud earrings are visible.

[Clothing & materials] She wears a plunging halter-style dress or top with a pale pink neck strap and a black fabric body covered in evenly spaced white polka dots. The neckline is deep and rounded, emphasizing a classic 1950s pin-up silhouette. Fabric looks smooth and slightly glossy, with subtle specular highlights on the bust and shoulders. No jacket, no necklace, no extra accessories.

[Environment] Minimal plain background in soft beige or warm off-white with no props, furniture, text, or scenery. The image reads as a clean retro poster portrait or fashion illustration with no environmental storytelling.

[Composition/Camera] Vertical portrait framing, medium close-up crop from top of bow ears to lower bust. Subject centered, shoulders angled very slightly, torso facing mostly forward. Camera is straight-on at eye level with a flattering editorial crop. Negative space remains clean around the silhouette, making the hairstyle, bow headpiece, and neckline the dominant design elements.

[Lighting] Soft, high-key beauty lighting with gentle warm highlights on the shoulders, cheeks, lips, and glossy hair. Shadows are minimal and diffuse. The image has a polished studio-pinup feel without dramatic contrast. No colored neon, no hard shadow, no directional sunlight.

[Color palette] Warm cream background, black hair, black-and-white polka dot garment, pale pink halter strap, peach skin tones, and subtle rosy makeup. Overall palette is simple, feminine, and retro.

[Style/Rendering] Polished anime pin-up illustration with retro fashion influence, clean contour lines, smooth cel-soft hybrid shading, glossy highlights, and a poster-ready finish. The styling should evoke vintage glamour filtered through modern anime aesthetics. Keep the rendering crisp, elegant, and charming rather than realistic or painterly.

[Detail constraints] Keep exactly one retro-styled woman on a plain warm cream background. Preserve the short curled black bob, large black bow headpiece, beauty mark, pink halter neckline, and black dress with white polka dots. Do not add scenery, extra jewelry, gloves, text, or additional figures. Maintain the vintage pin-up softness and avoid turning it into a contemporary streetwear portrait or photoreal image.

Negative prompt: detailed room, furniture, diner set, extra accessories, necklace, sunglasses, realistic photo texture, painterly brushwork, long hair, ponytail, missing bow headpiece, plain black dress without polka dots, neon colors, dark background, harsh shadows, angry expression, open mouth laugh, extra people, watermark, text overlay.

Suggested parameters: aspect ratio 4:5, focal feel equivalent to 50mm beauty portrait, full face and upper body sharpness, steps 28-38, CFG/style guidance 6-7.5, sampler DPM++ 2M Karras or Euler, stylize medium, seed suggestion 719433842.

Delta prompt strategy:
1. If the hair grows too long: add "short glossy vintage black bob with curled ends and side-swept bangs".
2. If the headpiece changes: add "oversized black ribbon bow ear accessories on top of the head".
3. If the polka dots disappear: add "black retro dress with evenly spaced white polka dots".
4. If the neckline changes: add "pale pink halter strap with deep pin-up neckline".
5. If the background gains detail: add "plain warm cream background with no environment elements".
6. If the mood becomes modern or edgy: add "soft retro pin-up glamour, sweet elegant expression".
7. If the beauty mark vanishes: add "small beauty mark near the cheek as a vintage charm detail".
8. If the lighting gets dramatic: add "soft studio beauty light with gentle warm highlights and minimal shadow".
9. If realism overtakes the style: add "polished anime fashion illustration with vintage poster finish".
10. If accessories multiply: add "no extra accessories besides small studs and the large black bow headpiece".