ruka (blueplus84), devola, popola, nier, nier (series), commentary request, 2girls, box, cross-laced slit, dress, green eyes, guitar, holding, holding guitar, holding instrument, instrument, long hair, long sleeves, multiple girls, music, on box, open mouth, playing guitar, playing instrument, red dress, red hair, siblings, singing, sisters, sitting, sitting on box, sitting on object, twins, wooden box