1girl, ass, back, bare_shoulders, bikini, black_bikini, black_hair, blush, breasts, cropped_legs, ebifurya, from_behind, isokaze_(kancolle), kantai_collection, long_hair, looking_at_viewer, looking_back, medium_breasts, one-hour_drawing_challenge, red_eyes, shoulder_blades, sideboob, simple_background, smile, solo, swimsuit, twitter_username, white_background