FURVERT!

abs anthro anus avian balls barazoku big_butt bird black_body black_feathers black_skin blush bubble_butt butt deltarune feathers genitals hi_res looking_at_viewer looking_back male mask muscular muscular_anthro muscular_male non-mammal_balls pink_anus presenting presenting_anus presenting_hindquarters red_eyes redeyedgazer solo swatchling tail tail_feathers thick_thighs undertale_(series)white_mask