1girl, agnes_tachyon_(umamusume), alternate_costume, animal_ears, black_headwear, black_sweater, breasts, brown_hair, ears_through_headwear, horei_tsuna, horse_ears, horse_girl, jewelry, large_breasts, looking_at_viewer, necklace, pink_background, red_eyes, ribbed_sweater, short_hair, simple_background, smile, solo, sweater, umamusume