1girl, alternate_costume, animal_ears, black_hair, blurry, blurry_background, blush, boat, breasts, cleavage, collarbone, dress, herohero_(higashi_no_dou), horse_ears, horse_tail, medium_breasts, mejiro_dober_(umamusume), outdoors, pov, river, sky, smile, tail, umamusume, watercraft