The Filthy Frank verse will catch you off guard with how surprisingly complex and developed the lore is. The story follows Filthy Frank, the entities living in his room, and their antics as they travel the Omniverse to make sacrifices to the Dark Lord Chin Chin in order to stay alive. The Filthy Frank Omniverse contains an unknown amount of parallel universes that vary in size, which hints at it being more of a Multiverse, especially since one character has implied that there are multiple of them. For reference: