kenken, saten ruiko, toaru kagaku no railgun, toaru majutsu no index, highres, image sample, pixiv sample, resized, 1girl, bare shoulders, bikini, black hair, blue eyes, breasts, collarbone, flower, front-tie top, gradient background, groin, hair flower, hair ornament, long hair, looking at viewer, navel, official style, open mouth, sarong, side-tie bikini bottom, smile, solo, standing, swimsuit, zoom layer