(masterpiece, best quality, ultra-detailed, anime style, soft pastel colors, warm lighting, cozy atmosphere, gentle steam, autumn mood), a cute cat family enjoying a traditional outdoor hot spring surrounded by red and yellow autumn leaves, one adult cat relaxing in the hot spring with a small towel on its head, calm and peaceful expression, eyes half-closed, steam rising softly, two small kittens floating in the hot water with their bodies stretched out, relaxed and happy faces, fluffy fur slightly wet, smooth stones and wooden edges around the bath, warm evening glow, soft reflections on water, mountain scenery and falling leaves in the background, tranquil and heartwarming composition, watercolor-like texture