Prompt: ((best quality, masterpiece)), 
extreme, 4 girls, bathing, submerged, natural lighting, star-gazing, open air, hot spring, onsen, close up, upper body, 21yo, wearing towel, white towel, (water reflection), night sky, vivid lighting,
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Negative prompt: (nsfw), (worst quality, low quality:1.4), ((text, signature, logo , captions)), verybadimagenegative_v1.3, easynegative