1girl, arms_up, black_hair, blue_one-piece_swimsuit, breasts, brown_eyes, collarbone, competition_swimsuit, cowboy_shot, hand_in_own_hair, jacket, kantai_collection, kasumi_(skchkko), large_breasts, long_hair, looking_at_viewer, nagato_(kancolle), one-piece_swimsuit, open_clothes, open_jacket, pool, smile, swimsuit, thigh_gap, wet, wet_clothes, wet_swimsuit, white_jacket