1girl, ass, bare_arms, bare_shoulders, black_eyes, black_hair, blue_one-piece_swimsuit, closed_mouth, competition_swimsuit, cowboy_shot, from_behind, houshou_(kancolle), kantai_collection, koruri, long_hair, one-piece_swimsuit, ponytail, racerback, simple_background, smile, solo, swimsuit, twitter_username, wet, wet_clothes, wet_swimsuit, white_background