This chapter feels like the usual Raiku trope of setting up the stake by showing how big the bad guy is, the gang will probably able to rid of the guy for now but at a cost of something.
All these contradictories aside, the author is really dropping the ball on the pacing too.
From a rather fast pace with a nice mix of actions and world settings, into all these series of academy slogs... I would really hate to drop this one and I hope the story get better soon