Rule 34 Dev - 1girl ahoge animal_ears blue_eyes dirty dirty_clothes grey_hair hairband highres horse_ears horse_girl horse_tail jacket long_hair long_sleeves looking_at_viewer official_art oguri_cap_(umamusume) pants ponytail solo tail track_jacket track_pants track_suit umamusume umamusume:_cinderella_gray white_background|25562923893