1girl, animal ears, black skirt, blue eyes, border, doll, ear covers, fang, grey background, grey hair, grey thighhighs, hairband, happy birthday, headband, holding, holding doll, horse ears, horse girl, horse tail, long hair, miniskirt, open mouth, pleated skirt, red headband, skirt, solo, tail, thighhighs, white border, zettai ryouiki