When a mysterious creature chops the moon down to a permanent crescent, the students of class 3-E of Kunugigaoka Middle School find themselves confronted with an enormous task: assassinate the creature responsible for the disaster before Earth suffers a similar fate. However, the monster, dubbed Koro-sensei (the indestructible teacher), is able to fly at speeds of up to Mach 20, which he demonstrates freely, leaving any attempt to subdue him in his extraterrestrial dust. Furthermore, the misfits of 3-E soon find that the strange, tentacled beast is more than just indomitable—he is the best teacher they have ever had!
Adapted from the humorous hit manga by Yuusei Matsui, Ansatsu Kyoushitsu tells the story of these junior high pupils as they polish their assassination skills and grow in order to stand strong against the oppressive school system, their own life problems, and one day, Koro-sensei.
[Written by MAL Rewrite]+ More
More Seasons
Characters & Voice Actors

Koro-sensei
Main
Araki, Teppei
Supporting
Asano, Gakushuu
Supporting
Asano, Gakuhou
Supporting
Chiba, Ryuunosuke
Supporting
Furyou A
Supporting
Fuwa, Yuzuki
Supporting
Gastro
SupportingRecommended for you
KamiErabi GOD.app
TV
22m
Protocol: Rain
TV
23m
My New Boss Is Goofy
TV
24m
Bullbuster
TV
24m
Kawagoe Boys Sing
TV
23m
Kizuna no Allele Season 2
TV
24m
Bikkurimen
TV
23m
Ochibi-san
TV
5m
Onimusha
ONA
28m
Good Night World
ONA
24m