1girl agnes_tachyon_(umamusume) ahoge animal_ears black_necktie black_pantyhose boots botantouki breasts brown_hair closed_mouth collared_shirt glint hair_between_eyes high_heel_boots high_heels highres horse_ears horse_girl horse_tail labcoat looking_at_viewer lying medium_hair necktie on_stomach pantyhose red_eyes shirt sleeves_past_fingers sleeves_past_wrists small_breasts smile solo sweater_vest tail tail_through_clothes test_tube the_pose umamusume white_footwear