1girl, alternate_costume, animal_ears, arms_behind_back, beach, bikini, breasts, brown_eyes, cleavage, ear_covers, embarrassed, hair_ornament, horse_ears, horse_girl, horse_tail, kurumiyasan_ns, looking_at_viewer, medium_breasts, navel, nice_nature_(umamusume), red_hair, short_hair, solo, sweat, swimsuit, tail, tan, tanlines, twintails, umamusume