1girl, alternate_costume, arm_support, blue_sky, breasts, cloud, competition_swimsuit, covered_navel, darker_than_black, grey_hair, groin, hat, horizon, long_hair, looking_at_viewer, medium_breasts, ocean, one-piece_swimsuit, outdoors, red_eyes, sand, sawatari_kazuma, shore, sky, solo, straw_hat, swimsuit, water, yin_(darker_than_black)