1girl, adapted_costume, arms_behind_back, bikini, black_bikini, breasts, brown_eyes, cleavage, cowboy_shot, front-tie_bikini_top, front-tie_top, gakky, kantai_collection, large_breasts, light_brown_hair, long_hair, murasame_(kancolle), one-hour_drawing_challenge, solo, standing, swimsuit, twintails