Well, Blanche has made their move. They’re literally bringing out the big guns to siege this school. But we’ve already seen that conventional weaponry is not quite as effective against mages, so presumably the rings that were shown will be the equalizer. There was also a decent amount of focus on Mizuki at the start of this episode, so that would probably suggest that she’ll be important pretty soon.
Next week continues the assault on the magic school. I can conceivably see this fight going on another two episodes, I’m going to guess this show is going to be more than 12 episodes long, as we’d be devoting over half the show to the first major battle. Plus, we still don’t know who that other guy in the opening is! …or Tatsuya’s secret for that matter.