1girl, animal_ears, blue_dress, blush, braid, breasts, closed_eyes, dress, ear_ornament, hair_between_eyes, hair_spread_out, horse_ears, horse_girl, horse_tail, long_hair, lying, mejiro_bright_(umamusume), on_back, open_mouth, puffy_short_sleeves, puffy_sleeves, short_sleeves, solo, tail, umamusume, very_long_hair, yoimoriyoru