masterpiece, best quality, highres, ultra-detailed, HDR, photorealistic, cinematic lighting, sharp focus, stunning dynamic range 18-year-old girl, the most beautiful girl in the world, model-like appearance, first phototype, fair skin, light blonde hair, delicate and cute facial features with intense passionate expression, man with muscular build, short hair, woman with long flowing hair, curvy figure, large perfectly shaped DD-size breasts, smooth flawless skin sexually aroused, highly aroused, face showing intense passion and desire, seductive expressions, detailed facial expressions, deep eye contact intimate scene, man and woman, both fully nude, engaged in sexual intercourse, man's penis penetrating woman's vulva, (doggy style position:1.3), public setting, inside a bus, sensual mood, public transportation realistic genitalia, well-defined male and female genitalia, carefully shaped penis, neatly defined labia, perfectly shaped symmetrical vulva, smooth hairless pubic area, prominent visibility, intense realism natural lighting, soft shadows, detailed background, public bus, intense and realistic