What if those light orbs from Koro-sensei's death created another yellow octopus like him? What if he became a teacher and taught class 3-5 at Paradise High? What if Karasuma, Irina, and old Class 3-E have to save the world again? What if half of the class of delinquents were offsprings of some couples in 3-E? How will they react when their parents shows up?