1girl, bikini, black_hair, breasts, brown_eyes, christmas, cleavage, closed_mouth, full_body, fur_trim, girls_und_panzer, hat, large_breasts, long_hair, looking_at_viewer, matsui_yasutsugu, navel, nishizumi_shiho, red_bikini, red_thighhighs, santa_costume, santa_hat, signature, simple_background, smile, solo, starry_background, swimsuit, thighhighs