Rule 34 Dev - 1girl agnes_tachyon_(umamusume) ahoge animal_ears brown_hair chibi chibi_only eyelashes flask hair_between_eyes happy_birthday holding holding_flask horse_ears lab_coat long_sleeves looking_at_object open_mouth short_hair sleeves_past_fingers sleeves_past_wrists solo sparkle twitter_username umamusume ume_(pickled_plum)|23573069910