Free-spirited, youthful, schoolgirl, casual pose, relaxed facial expression, messy bob-cut hair, minimal makeup, white tank top, denim shorts, sneakers, one leg bent, sitting on a tree stump, surrounded by lush greenery, warm sunlight filtering through leaves, natural setting, wooden fence in the background, vibrant flowers blooming nearby, soft focus, shallow depth of field, film grain effect, nostalgic atmosphere.