Wait wait wait so let me this straight (as if there's anything straight in this scho-..), the crossdressers have created a perfect ecosystem in a boy's school that prevents the class from getting out of control  thanks to their femininity but at the same time they're out of danger and fit anywhere because they're also bros... ? marvelous. 
Also, Is it me or this teacher plotting something? hmmm
Also#2, "Beyond the scope of friendship" what does he mean by that?   super friends?