crystal maiden (series), artist request, game cg, highres, official art, variant set, 1girl, black bra, black panties, black shoes, bra, breasts, brown hair, buttons, closed mouth, covered erect nipples, estel (crystal maidens), feathered wings, full body, jacket, long sleeves, looking at viewer, navel, open clothes, open jacket, panties, pink eyes, shoes, solo, transparent background, twintails, underwear, wings