FURVERT!

2020 2d_animation 3_heads all_fours animal_genitalia animal_penis animated animated_gif anthro balls becoming_erect big_balls black_nose canid canid_demon canine canine_genitalia canine_penis cerberus demon erection european_mythology feral_transformation forked_tongue frame_by_frame fur fur_growth genitals greek_mythology growth hellhound hexacult horn human human_to_feral humanoid_genitalia humanoid_penis knot line_art looking_at_viewer looking_back male mammal multi_head multifur mythological_canine mythological_creature mythology nude paws penis possession short_playtime simple_background snout solo spade_tail species_transformation tail tongue transformation vein veiny_penis