Chisa Yukizome, a former student at Hope's Peak Academy gets hired as a new teacher for Class 1 - B. However, most of the students didn't show up for class, leaving Chisa, Fuyuhiko Kuzuryu, Hiyoko Saionji, Mahiru Koizumi, Sonia Nevermind and Mikan Tsumiki to look for them. But things can get pretty crazy when the Ultimates are at play.