Traveler and Paimon in a Multiverse

After reading so many Fanfics I wanted to write one too, so here's the result!
I hope you guys will like it~

Like the tittle says it's about Traveler and Paimon in a multiverse with a slight spice here and there.

I planning to use many worlds so let me say this first, about the other world, I'm basing everything with Anime, so if there's a disperance between Manga, Novel or Anime. I'll prioritize Anime version. so yeah, I hope you guys won't be disappointed with this