best quality, 1girl, aqua eyes, arms behind back, bangs, bare arms, bare legs, bare shoulders, black bikini, black hair, blue eyes, blush, by yuuji and, cropped legs, from behind, glasses, hairband, halterneck, interlocked fingers, long hair, looking at viewer, looking back, parted lips, simple background, skindentation, small breasts, smile, solo, string bikini, under-rim eyewear, white background