The opening scene is referencing the Red Room from Marvel (and I know this only because I've watched Agent Carter!)

The other boy had a dad who supposedly cared about him. Did he know it was a good chance his son would be killed? That's creepy. Because if he didn't, why would he send his child to a school with a really high death-rate?

And what kind of business model is it to kill students after you've invested several years of training in them?