1girl, black_eyes, black_hair, breasts, christmas, cleavage, el_(girls_und_panzer), full_body, girls_und_panzer, gloves, hat, holding, holding_sack, large_breasts, looking_at_viewer, matsui_yasutsugu, one-hour_drawing_challenge, red_footwear, sack, santa_costume, santa_hat, santa_leotard, signature, simple_background, smile, solo, starry_background