It's like half of that chapter was from a later date in time xD Rimuru wasn't even labeled a demon lord yet rofl and clearly we didn't see how the orc's get taken down nor how that huge city was made o_o so we saw a sneak peek into a future chapter lol.
Yeah, you're right except for the fact that it was a full chapter from the future, not a half one. Lol
Still a sneak peek xD
I think this is like a long extra
It's for another side story manga http://www.mangago.zone/read-manga/tensei_shitara_slime_datta_ken_the_ways_of_strolling_in_the_demon_country/
o-o So I see, strange lol.
That's strange... Is chapter 15 from a later part in the manga? Because there is such a huge jump from Rimuru living in a village to living in a city. Not to mention the Lizardmen, Orc, and Ogre conflict? What happened to that?