@MarvN:
You only started wondering now?
I did that as soon as I read the summary before even reading any chapters. It says "So... none of them is a normal high school student, each of them are super human high school students that stand at the top of politics, economics, science and medicine!" there after all.
And my suspicions were confirmed the moment we learned of Tsukasa.
He bested his own corrupt father after all.