The students of Class 3-E have a mission: kill their teacher before graduation. He has already destroyed the moon, and has promised to destroy the Earth if he can not be killed within a year. But how can this class of misfits kill a tentacled monster, capable of reaching Mach 20 speed, who may be the best teacher any of them have ever had?

Get ready for a strange but fun-filled adventure with your favorite group of assassins. The killer class is back but this time they’ve got…magic?! In this brand new spin-off series, follow the chibis of Class 3-E as they learn swordsmanship and sorcery at Kunugigaoka Magic School. Their mission? Defeat the evil Demon King Koro Sensei and face the trials and perils of their magical school!

Kiyotaka Ayanokoji has just enrolled at Tokyo Koudo Ikusei Senior High School, where it's said that 100% of students go on to college or find employment. But he ends up in Class 1-D, which is full of all the school's problem children. What's more, every month, the school awards students points with a cash value of 100,000 yen, and the classes employ a laissez-faire policy in which talking, sleeping, and even sabotage are permitted during class. One month later, Ayanokoji, Horikita, and the students of Class D learn the truth of the system in place within their school...