Dumping chapter 7
It's just another manga adaptation, it's nothing special really.
I just hope IG doesn't use these designs for the new show in '17
They're on Kapche-Lanka. The manga is currently covering the Silver White Valley arc from the Gaiden OVA.
Before that it was the Empire's Afterflow, which was in episode 4 & 5 of the original OVA I think.