1girl, d, animal_ears, arm_behind_head, arm_up, armpits, bikini, blush, breasts, brown_hair, cleavage, daiwa_scarlet_(trifle_vacation)_(umamusume), daiwa_scarlet_(umamusume), day, hair_intakes, harusame_tsubaki, horse_ears, horse_girl, horse_tail, large_breasts, long_hair, looking_at_viewer, official_alternate_costume, outdoors, red_bikini, red_eyes, self_cosplay, smile, solo, swimsuit, tail, tiara, twintails, umamusume, umbrella, upper_body, very_long_hair, wet