1girl, ass, beach, bikini, black_hair, blush, breasts, brown_eyes, cleavage, closed_mouth, collarbone, girls_und_panzer, hand_on_own_hip, large_breasts, long_hair, looking_at_viewer, matsui_yasutsugu, navel, nishizumi_shiho, ocean, outdoors, side-tie_bikini_bottom, solo, swimsuit, thong_bikini, white_bikini