A photorealistic 8K image of a 22-year-old amateur Caucasian girl with a highly detailed realistic face, sharp angular features, and high cheekbones. She has very long, slightly bright hair with a soft natural flow, a slim feminine body with subtle sexy curves, large perky D-cup breasts with natural hang and stretch, a very slim toned waist, narrow hips, slender figure, subtle toned abs, flat stomach, and natural feminine softness. She's standing on the deck of a huge luxurious yacht in full sunny weather with bright natural lighting and soft shadows, fully topless with her breasts stretched out, wearing a mono-color low-cut G-string thong. She has a sweet smile, hot sexy direct eye contact, in a full-body photo from above the knees, frontal view centering on her full body. Keep the background minimal with no boat visible except at most railings, and otherwise just the sea.