yorishiro la, saten ruiko, toaru kagaku no railgun, toaru majutsu no index, absurdres, commentary, highres, 1girl, bare shoulders, between legs, black bow, black bowtie, black hair, black one-piece swimsuit, blue eyes, bow, bowtie, breasts, cleaning robot, closed mouth, covered navel, frilled one-piece swimsuit, frills, hand between legs, highleg, highleg one-piece swimsuit, long hair, looking at viewer, maid, maid headdress, maid one-piece swimsuit, ocean, off-shoulder one-piece swimsuit, off shoulder, official alternate costume, one-piece swimsuit, sitting, small breasts, smile, solo, swimsuit, unconventional maid