These random flashbacks are too much. Because of that, the story has barely made any progress in the last 40 chapters. Flashback are usually grouped together. And if it's too long, it's grouped in parts. The point is, this flashback timing is wrong and useless. What's the point in telling us that this woman wants to kill Anz with her own hands, right now? It should be focusing on the students trying to escape their current predicament, that's all.