1girl, ahoge, alternate_costume, bag, breasts, christmas_tree, closed_mouth, dress, greyscale, hair_ribbon, hat, holding, holding_bag, koyuki_(kotatsu358), large_breasts, long_hair, looking_at_viewer, monochrome, neet_de_otaku_na_kunoichi_to_naze_ka_dousei_hajimemashita, ribbon, santa_dress, santa_hat, shizuri_(neet_de_otaku_na_kunoichi_to_naze_ka_dousei_hajimemashita), sidelocks, smile, solo, standing