Rule 34 Dev - 1girl animal_ears black_hair character_name hand_on_own_hip happy_birthday highres holding holding_umbrella horse_ears horse_girl horse_tail kotobuki_(momoko_factory) long_hair looking_at_viewer narita_brian_(umamusume) navel oil-paper_umbrella ponytail solo tail twitter_username umamusume umbrella yellow_eyes|16024313214