ryota022816, stay gold (umamusume), umamusume, highres, 1girl, animal ears, bed, black hair, blush, brown eyes, gradient hair, heavy breathing, horse ears, horse girl, implied sex, long hair, looking at viewer, lying, multicolored hair, on back, on bed, out-of-frame censoring, pillow, pillow grab, school uniform, short sleeves, smile, socks, solo, summer uniform, sweat, tracen school uniform, upper body, white socks