A photorealistic full-body shot of a 26-year-old Japanese woman with shoulder-length brown hair, swimming underwater in a river. She is wearing a white T-shirt that is soaking wet, translucent, and clinging to her body, revealing a black bra underneath, paired with black yoga shorts that are saturated and heavy with water. Her hair is plastered to her head and shoulders, and her skin has a realistic wet sheen with water droplets. She has a cheerful expression on her face. The scene is set underwater in a clear river with natural light filtering through the surface, creating caustic light patterns. Full body composition, high-resolution photography, sharp focus, cinematic lighting, realistic textures.