Flug and orphan Demencia with their pet ‘5′ live in an isolated island far from the post apocalyptic civilization where parasitic infection has diseased everyone. Flug too is infected only on his face, spreading no further, and Demencia is immune to the disease (unknown to flug). A parasitic doctor, He tries to find a cure.
At the same time, black hat was tricked into wearing a wrong hat, a parasitic hat that has latched onto his head and slowly infects him. He has come to Dr Flug for help.
That’s the au :3
Oh and Demencia draws on Flug’s paperbag face all the time (he changes it everyday)
Everyone always draw flug in every au with the same paperbag, I made him wear a different one :3c