sango0707315, seiun sky (umamusume), highres, 1girl, adjusting clothes, adjusting necktie, animal ears, black shirt, blue eyes, blush, closed mouth, ear covers, flower, green necktie, grey hair, hair flower, hair ornament, horse ears, horse girl, necktie, shirt, short-sleeved sweater, short hair, short sleeves, simple background, single ear cover, single ear down, solo, sweater, white background, white sweater, yellow flower