The series follows the daily life of an extremely powerful octopus-like being working as a junior high homeroom teacher, and his students dedicated to the task of assassinating him to prevent Earth from being destroyed.
He soon proves to be unable to be killed by the world governments due to his arsenal of superpowers including accelerated regeneration, visual cloning, near-impenetrable skin, and the ability to move and fly at Mach 20.
Per the resulting agreement, the creature becomes a teacher at Kunugigaoka Junior High School, his students being members of Class 3–E, a class that is intentionally disadvantaged academically due to low grades, inability to meet the school's strict rules and policies, and other forms of cruel and unusual punishment.
1], before his imposed deadline of the end of the school year, and are granted specialized weapons developed by the government that can kill him; further, Koro-sensei is forbidden from harming the students in any capacity.
However, this proves to be a virtually impossible task not only due to his superpowers and death anxiety, but because he is also the best teacher they could ask for, helping them to improve their grades, individual skills, and prospects for the future.
The students eventually learn the secrets involving him, the Moon's destruction, his ties with their previous homeroom teacher, and the true reason why he must be killed before the end of the school year.
[16] An anime television series based on the manga began airing on Fuji TV from January 9, 2015, and ran for 22 episodes.
[17][18] The anime television series was directed by Seiji Kishi at Lerche, with Kazuki Morita as character designer and Makoto Uezu as the lead scriptwriter.
[19] An OVA episode was included on the first BD/DVD volume released on March 27, 2015, following a screening at Jump Special Anime Fest in November 2014.
4], a 5-member group consisting of the characters Nagisa Shiota (Mai Fuchigami), Karma Akabane (Nobuhiko Okamoto), Kaede Kayano (Aya Suzaki), Yūma Isogai (Ryota Osaka), and Hiroto Maehara (Shintaro Asanuma).
[25][26] On June 30, 2016, two anime films were announced: Assassination Classroom the Movie: 365 Days and Koro Sensei Quest!.
[27] Adult Swim's Toonami programming block began broadcasting Funimation's English dub of the anime starting on August 30, 2020.
JUMP's Ryosuke Yamada as the main character, and Arashi's Kazunari Ninomiya voicing the tentacled teacher Koro sensei.
[49] Assassination Classroom ranked first in "Nationwide Bookstore Employees' Recommended Comics" by the Honya Club website in 2013.
[51] It placed second in male-oriented comics category on the list of "Book of the Year" by Media Factory and manga news magazine Da Vinci.
[52] Nippon Shuppan Hanbai elected it the best work of 2013 in their "Recommended Comic Books Across the Country Clerk's Choice".
[54] In February 2015, Asahi Shimbun announced that Assassination Classroom was one of nine nominees for the nineteenth annual Tezuka Osamu Cultural Prize.