1girl, animal_ears, black_shorts, blush, breasts, brown_hair, closed_mouth, dolphin_shorts, dot_nose, holding, holding_pillow, horse_ears, horse_girl, horse_tail, looking_at_viewer, medium_breasts, narusawa_(njzc2582), one_eye_closed, pillow, pink_eyes, rubbing_eyes, shirt, short_sleeves, shorts, sitting, solo, symboli_rudolf_(umamusume), t-shirt, tail, thighs, umamusume, underwear, white_background, white_shirt