1girl, animal_ears, ass, ass_focus, bad_pixiv_id, bare_shoulders, blush, from_behind, hair_ornament, horse_ears, horse_girl, horse_tail, jewelry, long_hair, looking_back, lying, mejiro_mcqueen_(ripple_fairlady)_(umamusume), mejiro_mcqueen_(umamusume), necklace, official_alternate_costume, on_stomach, outdoors, purple_eyes, purple_hair, solo, swimsuit, tail, umamusume, user_jhjm8428