1girl, ahoge, animal_ears, black_one-piece_swimsuit, blue_eyes, breasts, casual_one-piece_swimsuit, cleavage, feet_out_of_frame, horse_ears, horse_girl, horse_tail, long_hair, medium_breasts, oguri_cap_(umamusume), one-piece_swimsuit, poolside, retsuto, side-tie_swimsuit, sitting, solo, swimsuit, tail, umamusume, yokozuwari