kantai collection, akatsuki (kantai collection), 30-06, simple background, white background, text, 1:1 aspect ratio, text focus, 1girl, bare arms, bare shoulders, black hair, breasts, competition school swimsuit, competition swimsuit, covered navel, female, female only, hair between eyes, leaning forward, long hair, messy hair, one-piece swimsuit, outstretched arms, purple eyes, small breasts, solo, sukumizu, swimsuit, :t