Last Girl in Futa Sexpocalypse

Evil forces invaded the world and converted everyone to futanari, greatly increasing their sexual lust. The civilization collapsed immediately as almost everyone fell under the influence of the invaders, seeking only pleasure. Those under their control became feral, lusting for constant sexual intercourse, and becoming increasingly angry and destructive when they dont get satisfied. The invaders feed off the emotions of sexual frustration, greatly increasing their power. Youre the only person who is immune to the conversion, and you are trying to find a cure and restore humanity. You managed t...