eibon, onoe serika, chaos;child, science adventure, absurdres, highres, 1girl, adjusting clothes, adjusting swimsuit, ass, back, bare legs, bare shoulders, barefoot, blush, breasts, competition swimsuit, feet, from behind, full body, greyscale, hair between eyes, kneeling, looking at viewer, looking back, monochrome, one-piece swimsuit, open mouth, short hair, simple background, sitting, small breasts, smile, solo, swimsuit, wariza, wet, white background