Shinmise Kaiten Harenchi Gakuen

It's the Reiwa era and the infamous Shameless School is back yet again. Has anything changed since the first appearance in the Showa era? Or is it so that modern times can't fix a "masterpiece" of the past?
Note: This is a special one-shot published in Shonen Sunday Comics special "Mangaka Book Special Nagai Go Book".