So I'm betting the next 3 chapters are:
-Narrowly avoiding beatdown
-Gloating, despair
-Surprise turnaround
My bet is that the demon lady from the magic association will show up somehow (without actually addressing how she crosses the intervening distance, since apparently the teleportation cheat is really rare), get herself owned by Ran, and spill that they're all being used anyway. At which point they'll conveniently forget the fight without really resolving it.
Possibly with a "we need Ran to stop the demons since the leadership is conveniently all girls"
Or... Oh, hmm... They'll have the demon girl operate the teleporter in the back of the ruins to get away from the guys. It goes anywhere the user is familiar with, so the demon girl can take them to demon territory. And then Ran goes on a rampage through the demon army, which is all cute girls in the places that matter.
Possibly grabbing the teleporting classmate before they leave.