shironeko yuuki, flandre scarlet, remilia scarlet, touhou, highres, 2girls, backless dress, backless outfit, bat (animal), bat wings, black dress, blonde hair, blue hair, crystal wings, dress, full moon, huge moon, interlocked fingers, looking at viewer, moon, multiple girls, night, off-shoulder dress, off shoulder, one side up, parted lips, red dress, red eyes, red moon, red sky, scarlet devil mansion, siblings, sisters, sky, smile, star (sky), starry sky, wings