1girl, black_hair, breasts, collarbone, competition_swimsuit, headgear, kantai_collection, large_breasts, long_hair, maru_(marg0613), nagato_(kancolle), one-hour_drawing_challenge, one-piece_swimsuit, red_eyes, simple_background, sitting, solo, swimsuit, two-tone_swimsuit, white_background, white_one-piece_swimsuit, yokozuwari