Prompt: ultra detail,extreme, 4 girs, bathing, submerged, natural lighting, <lora:add_detail:0.3>, star-gazing, open air, hot spring, onsen, close up, upper body, 21yo,  wearing towel, white towel, (water reflection), night sky, vivid lighting, 
Negative prompt: (worst quality, low quality:1.3), logo, watermark, signature, text, bad-hands-5, easynegative, (sauna:1.2)