Beelzebub: "And thus the story of Demontober comes to an end. I do hope you all enjoyed this little yarn I spun. And remember, though the story has come to an end, the memories created and the lives touched by it never disappear so long as there are those who pass them down. There will always be a new stories to be told because imagination is always growing."

It all ends just as it began: with Best Demon.

I like to imagine that all fanmade demons are canon due to the infinite space of Hell.