FURVERT!

1:1 anthro asriel_dreemurr_(god_form)boss_monster_(undertale)bovid boxer_briefs bulge caprine clothing english_text goo-connected_lips goo_creature goo_transformation gunshward hi_res horn human humanoid latex male mammal markings mid_transformation nude slime solo species_transformation struggling symbiote takeover text transformation undertale undertale_(series)underwear