4girls, alternate_hairstyle, animal_ears, artist_name, bath, bathing, bathroom, breasts, brown_hair, cleavage, closed_mouth, exhausted, fang, grey_eyes, grey_hair, heat_stroke, horse_ears, horse_girl, large_breasts, laughing, long_hair, mayano_top_gun_(umamusume), mukakin, multiple_girls, narita_brian_(umamusume), nude, oguri_cap_(umamusume), orange_hair, partially_submerged, rubber_duck, tamamo_cross_(umamusume), towel, towel_on_head, umamusume, water, yellow_eyes