2girls, black eyes, bright pupils, brown hair, closed eyes, cosplay, dated, frilled hat, frills, ghost, hat, hat ornament, instrument, keyboard instrument, long sleeves, multiple girls, music, open mouth, playing instrument, red headwear, red shirt, red skirt, shirt, short hair, simple background, skirt, solo focus, star symbol, star hat ornament, twitter username, white background, white hair, white pupils