Create a vertical 9:16 adult fashion portrait with a warm vintage Japanese onsen ryokan atmosphere, photographed like 35mm film. Use soft wooden lantern light mixed with gentle natural window light, subtle film grain, warm color shift, intimate editorial framing, and a medium shot. The subject is an original adult East Asian woman with refined realistic features, almond-shaped eyes, natural double eyelids, high nose bridge, delicate jawline, warm ivory skin with subtle texture and pores, soft natural makeup, dewy glow, rosy cheeks, and soft pink lips. Her long dark brown hair is tied in a loose low bun with a few relaxed strands around the face and neck.
She wears a loose white yukata in a non-explicit sensual fashion styling: one shoulder slightly slipped, the waist loosely tied, fabric draping naturally and revealing only tasteful collarbone/shoulder skin. She sits barefoot on the edge of a traditional wooden engawa veranda at a vintage onsen ryokan, body gently turned toward the camera, one leg bent on the wooden floor, the other leg relaxed downward, one hand lightly holding the yukata collar and the other supporting her behind. Her gaze is gentle, warm, and quietly inviting, not explicit. Background: warm wooden interior, paper sliding doors, and a distant steaming hot spring in soft focus. Add gentle rim lighting on skin and fabric, authentic vintage film color grading, natural hair strands, realistic yukata wrinkles and drape, soft but detailed skin rendering, no plastic skin, no over-sharpening, no airbrushing, no text, no watermark, no nudity, no explicit sexual pose, original adult subject only. Output aspect ratio: 9:16.