User blog comment:Halo1081/Chapter 128 and forward/@comment-4911196-20150221091114/@comment-4911196-20150222043243

Class E will sure involved and.. I forgot who is the person who took Itona before he joined Class E? Despite the hint he has, it's impossible to defeat Korosensei since Nagisa is the core of Korosensei's weaknesses information.

Gakushu probably sniffed out Class E as he always want to know about Class E after he admit them as a superior class throughout many academic and other challenges. That will involve Gakuho as well which probably reinforcing the Class E to be more reinforced as he want the students to be "strong".