"We have to talk about yesterday," the teacher started saying. "As you know, there has been an unprecedented increase in the amount of invasions we have been experiencing these last few months. Experiencing an invasion every week was already very taxing on our human resources. We can't afford to lose any more manpower than we already have. However, yesterday was an absolute disaster. And it probably is a precursor for much worse things to come."
Hearing the grim words of their teacher, the always rowdy and crazy students became more tame. No matter how many problems they had in their heads, the current situation was too harsh to ignore.