1girl bikini black_hair blush breasts closed_mouth collarbone cowboy_shot front-tie_bikini_top front-tie_top gin'ichi_(akacia) grey_eyes groin hair_between_eyes hayasui_(kancolle) jacket kantai_collection large_breasts navel open_clothes open_jacket short_hair simple_background solo standing swimsuit track_jacket white_background white_bikini white_jacket