[Sunred]

Yoshizawa Ryo(Sakuta Ryusei/Kamen Rider Meteor), Sano Gaku(Kazuraba Kouta/Kamen Rider Gaim), and Shimizu Kazuki(Don "Hakase" Dogoier/Gokai Green) have been confirmed to play students under the tutelage of Hell Teacher Nube.
One thing to point out is that unlike the source material, the live-action adaptation will have the students as high school students.
The three actors will be playing:


Yoshizawa Ryo as Kimura Katsuya


Sano Gaku as Shirato Shuichi


Shimizu Kazuki as Yamaguchi Akira


Hell Teacher Nube will start airing October 11th 9PM on Japanese broadcasting station NTV source: http://www.ntv.co.jp/nube/