1girl, bikini, black_hair, blue_sky, blush, breasts, cleavage, cloud, day, hair_over_shoulder, long_hair, low_ponytail, navel, no._(pixiv73936015), original, outdoors, partially_underwater_shot, red_bikini, red_eyes, side-tie_bikini_bottom, sky, small_breasts, solo, swimsuit, wading, water