Isekai demo Bunan ni Ikitai Shoukougun - Vol. 6 Ch. 28.1

[MangaDex]

 

[TheProtectorOfPureHeartedGirls]

Now, they're in a pickle.

 

[Beregorn]

Where did she get the Soul Edge?

 

[Tap2]

One might discuss the pickle level, since all that's necessary is for our protagonists to leave the cordoned-off area, after which any number of knights, etc. could get involved.
But sure, mangaka, tell us readers "oh, we are alone, since no one can enter the area", and then hopefully we won't think for ourselves ...