1girl, ass, back, bikini, black_ribbon, blue_sky, breasts, broom, brown_eyes, brown_hair, bucket, butt_crack, closed_mouth, cloud, cloudy_sky, cowboy_shot, day, from_behind, girls_und_panzer, hair_ribbon, halterneck, holding, holding_broom, holding_bucket, koyama_yuzu, looking_at_viewer, looking_back, medium_hair, outdoors, ponytail, ribbon, sky, smile, solo, standing, swimsuit, tanaka_rikimaru, white_bikini