1girl, alternate costume, animal ears, backless dress, backless outfit, black dress, breasts, bridal gauntlets, character name, copyright name, double bass, dress, extra ears, fox ears, fox girl, fox tail, full body, grey hair, hair behind ear, high heels, instrument, looking at viewer, medium breasts, multiple tails, music, nijisanji, nijisanji en, nina kosaka, playing instrument, red eyes, red footwear, sideboob, smile, solo, tail, twitter username, virtual youtuber, yoshiko (rizz cinax), zoom layer