1boy, 1girl, 2022, aoki_midori, aoki_takashi, arms_up, belt, black-framed_eyewear, black_belt, black_eyes, black_hair, black_pantyhose, blush, breasts, brother_and_sister, christmas, coat, constricted_pupils, dress, dress_tug, floating, fur-trimmed_dress, fur-trimmed_footwear, fur-trimmed_gloves, fur_collar, fur_trim, glasses, gloves, hat, holding, holding_sack, long_hair, long_sleeves, looking_at_viewer, medium_breasts, merry_christmas, nee-chan_wa_takashi_no_koto_ga_suki_da_suki_da_daisuki_da!!, open_mouth, pants, pantyhose, red_coat, red_dress, red_footwear, red_gloves, red_headwear, red_pants, sack, santa_costume, santa_dress, santa_hat, shoes, short_hair, siblings, sky, smile, star_(sky), starry_sky, strapless, strapless_dress, sweatdrop, ten_(face), very_short_hair