sudzume, maruzensky_(blasting_off_summer_night)_(umamusume), maruzensky_(umamusume), year_2024, 1girl, animal_ears, bare_shoulders, bikini, birthday, black_bikini, breasts, brown-tinted_eyewear, brown_hair, cleavage, eyewear_on_head, frilled_bikini, frills, happy_birthday, heart, heart-shaped_eyewear, horse_ears, horse_girl, horse_tail, jewelry, large_breasts, long_hair, looking_at_viewer, necklace, official_alternate_costume, official_alternate_hairstyle, orange-tinted_eyewear, ponytail, solo, swimsuit, tail, tinted_eyewear, white-framed_eyewear, , umamusume