1girl, andou_(girls_und_panzer), ass, bikini, black_bikini, black_hair, blush, breasts, brown_eyes, butt_crack, closed_mouth, dsuzu, girls_und_panzer, hands_on_own_hips, looking_at_viewer, looking_back, medium_breasts, ocean, outdoors, short_hair, sky, smile, solo, standing, swimsuit