1girl, :o, artist name, blonde hair, blush, cardigan, collarbone, green cardigan, green eyes, green neckerchief, grey sailor collar, grey skirt, hair ornament, hairpin, happy birthday, long hair, long sleeves, looking at viewer, neckerchief, open cardigan, open clothes, parted lips, photo background, sailor collar, school uniform, serafuku, skirt, solo, standing, watermark, winter uniform