shikyou yoru, perlica (arknights), arknights, arknights: endfield, absurdres, commentary request, highres, partial commentary, 1girl, animal ears, black pantyhose, blue eyes, book, covering own mouth, grey hair, grey sweater, holding, holding book, knees together feet apart, long hair, looking at viewer, no shoes, panties, panties under pantyhose, pantyhose, sleeveless, sleeveless sweater, sleeveless turtleneck, solo, sweater, turtleneck, turtleneck sweater, underwear