@Hexador
Well....There is a giant arse wall, and there are the consistent invasion of monsters (Kijial). The entire premise of the Tersia family resides in protecting their land from these monstrous invasions.
So, yeah. Chap 15 is no way the end of the story, but it does feel like it all ties together so nicely, that it's hard to see how the story can keep up the same momentum.
Honestly, I am getting Claymore vibes right now.