1girl, ahoge, animal ears, arm up, armpits, birthday, black hair, bob cut, bouquet, brown eyes, clenched hand, dated, detached sleeves, hair ribbon, happy birthday, holding, holding bouquet, horse ears, horse girl, multicolored hair, pleated skirt, red ribbon, ribbon, short hair, skirt, solo, streaked hair, thighhighs, two-tone hair, white hair, zettai ryouiki