[Title Change] "Reverse Isekai Stories" -> "Adventurers! Welcome to our world"

So... The first tile was more of a placeholder / working title. And I think this one's a bit better, but I still don't think it's it, so I'll be still looking for even better one :)

I've also adjusted a main thumbnail to reflect the branch I'm currently updating. I'll continue rotating thumbnails into the future to give a good indication which branch will receive updates given week.

Finally a big Thank you! who supported the series so far especially from the daily readers like Ebanu and zerochris, but also to everyone who gave a thumb to a path they like!