shi (shi4557), amiya (arknights), arknights, highres, 1girl, :d, animal ear fluff, arms behind back, ascot, black jacket, blue ascot, blue collar, blue eyes, blush, collar, dated, hair between eyes, jacket, long hair, looking at viewer, open clothes, open jacket, open mouth, pixiv id, ponytail, shirt, simple background, smile, solo, twitter username, upper body, very long hair, watermark, web address, white background, white shirt