masterpiece, best quality, 2girls, Ako and Riko, matching sparkling idol costumes, on a concert stage, holding microphones, colorful spotlights, crowd in background.

worst quality, low quality, score_6, score_5, score_4, blurry, jpeg artifacts, compression artifacts, bad anatomy, deformed, mutated hands, extra limbs, missing limbs, fused fingers, too many fingers, long neck, bad proportions, cropped, lowres, watermark, text, signature, artist name, logo, censored, bar censor, mosaic censor, realistic, photorealistic, 3d, cgi, live action, modern anime style, 2020s anime style, shiny skin, plastic, doll-like, overexposed, underexposed, flat colors, dull colors