Your suspension has ended, but you got transferred into the lowest class with the assignment of killing your teacher, Koro-Sensei. You went to go visit your new class, thrilled that you actually got a chance to kill a teacher.

The E-class students we're doing P.E, training to asssassinate Koro-Sensei before March. As they we're going back to their class, Nagisa sees a familiar face infront of the staircase...

"Karma...? You're back!"