1girl, balloon, black_choker, black_hair, choker, closed_eyes, detached_sleeves, dress, fish_hair_ornament, hair_ornament, instrument, long_hair, multicolored_hair, music, naokomama, nijisanji, nijisanji_en, orange_hair, petra_gurin, piano, playing_instrument, playing_piano, solo, streaked_hair, virtual_youtuber