A 34-year-old Japanese woman with medium black hair, fully submerged underwater in a lake. She is wearing a black lace bra and black panties, with the fabric appearing soaking wet, darkened, clinging to her skin, and showing heavy wet folds and water-saturated texture. Her skin and hair are completely drenched with a realistic underwater water sheen and light refraction. She has a cheerful expression on her face. Full body shot including the face, captured from a wide angle underwater, clear lake water, soft ambient light filtering from the surface, photorealistic, high detail, 8k resolution.