1girl, alcohol, alternate_costume, arknights, back_tattoo, bare_shoulders, blush, closed_mouth, cup, day, from_behind, green_hair, holding, holding_cup, horns, hoshiguma_(arknights), japanese_clothes, kimono, long_hair, looking_at_viewer, looking_back, off_shoulder, open_clothes, open_kimono, outdoors, poni_(poni_arknights), sakazuki, sake, single_horn, smile, snowing, solo, tattoo, upper_body, very_long_hair, yellow_eyes