1girl ahoge animal_ears arms_under_breasts biwa_hayahide_(umamusume) breasts closed_mouth cropped_torso ear_ornament emphasis_lines glasses grey_hair highres horse_ears jacket kawamochi_(tddm3573) long_hair long_sleeves looking_at_viewer medium_breasts red-framed_eyewear red_jacket semi-rimless_eyewear smile solo tracen_training_uniform track_jacket umamusume upper_body white_background yellow_eyes zipper