User blog comment:Halo1081/So About Korosensei's Past.../@comment-4524007-20150511133441/@comment-5707992-20150511183843

Keep in mind no one but the those who worked at Yanigisawa's lab knew that it was a rat with antimatter cells that blew the moon. Korosensei, a supercreatue with speeds of Mach 20, openly stated that it was him who blew up the moon and then states that he'll do the same to Earth a year from now, and no one but Yanagisawa and his lab know the full truth, of course everyone will be out for Korosensei.