European-Russian girl, mid-shot selfie, long silky black hair cascading over her shoulders, wearing a snug knitted sweater that slips off one shoulder, sitting casually on a windowsill with soft daylight filtering through, one leg tucked under her, the other stretched out, holding a book with a relaxed yet seductive smile, minimal makeup enhancing her natural beauty, warm cozy room with simple decor, soft golden lighting, gentle and inviting expression, bare feet resting on the windowsill, captivating and approachable charm, playful yet elegant vibe, subtle sensuality, casual yet polished look