1girl, ahoge, black_one-piece_swimsuit, blue_one-piece_swimsuit, blush, breasts, brown_hair, competition_swimsuit, covered_navel, cowboy_shot, dated, double_bun, hair_bun, hairband, impossible_clothes, impossible_swimsuit, kantai_collection, kongou_(kancolle), large_breasts, long_hair, looking_at_viewer, montemasa, one-hour_drawing_challenge, one-piece_swimsuit, open_mouth, simple_background, smile, solo, swimsuit, twitter_username, two-tone_swimsuit, white_background