1girl animal_ears blush bottle breasts brown_eyes brown_hair closed_mouth ear_ribbon green_ribbon grey_background highres holding holding_bottle horse_ears horse_girl horse_tail jacket large_breasts long_hair long_sleeves looking_at_viewer plastic_bottle red_jacket red_shorts ribbon satono_diamond_(umamusume) shiseki_hirame shorts simple_background smile solo sweat tail tracen_training_uniform track_jacket umamusume water_bottle zipper