1boy, 1girl, android, anger vein, bare shoulders, black tank top, blue skin, blurry, blurry foreground, clenched teeth, colored skin, eyeshadow, full body, head fins, instrument, leaning back, leg up, looking back, makeup, mechanical arms, mettaton, mettaton ex, piano, reclining, red eyeshadow, robot, sharp teeth, shoji sakura, sitting on piano, sparkle, stage lights, sweatdrop, tank top, teeth, undertale, undyne, upper body