1girl, ahoge, black_hair, blue_one-piece_swimsuit, casual_one-piece_swimsuit, cowboy_shot, jacket, kantai_collection, long_hair, looking_to_the_side, official_alternate_costume, one-hour_drawing_challenge, one-piece_swimsuit, polka_dot, polka_dot_swimsuit, simple_background, solo, suda_(yuunagi_enikki), swimsuit, ushio_(kancolle), white_background, white_jacket