Alexey Skobkin (books) commented on Monster Tamer: Volume 16 by Minto Higure
Majima Takahiro and his friends survive the ordeal inside the labyrinth and learn the truth …
Looks like it could also be the "final" volume which not concludes the story because there are problems with original (Japanese) light novel publication. The story from web novel requires ~2 more volumes to be properly concluded. And there was no light novel volume since 2020.
That's sad.