FURVERT!

anthro bday belly birthday black_text bottomless clothed clothing dialogue duo english_text equid equine female fluffy fur gift happy happy_birthday hat headgear headwear hi_res horse humor male mammal panties party_hat slightly_chubby slightly_chubby_anthro slightly_chubby_female smile speech_bubble stated_adult stated_age steven_saidon sunny_way sunny_way_(character)text thick_thighs underwear underwear_on_head