1girl, 2boys, bangs, birthday_cake, blush, brother_and_sister, cake, confetti, food, full_body, greyscale, hair_between_eyes, happy_birthday, hat, holding, holding_plate, knees_up, long_skirt, long_sleeves, looking_at_another, monochrome, multiple_boys, open_mouth, pants, party_hat, plate, ponytail, round_eyewear, shirt, siblings, sidelocks, simple_background, sitting, skirt, spiked_hair, sunglasses, sweater, turtleneck, turtleneck_sweater