Assassination Classroom

is an ongoing Japanese manga written and illustrated by Yūsei Matsui that was serialized on the Weekly Shōnen Jump magazine starting in issue 31, released July 2012.

A single original video animation adaptation by Brain's Base based on the series was screened at the Jump Super Anime Tour on October to November 2013. This was followed by an anime television adaptation by Lerche, which began airing on Fuji TV in January 2015. This adaptation has been licensed by Funimation for release in North America. The series was obtained by Madman Entertainment for digital distribution in Australia and New Zealand. A live action film adaptation was released on March 21, 2015, and a sequel, titled Assassination Classroom: Graduation, was released on March 25, 2016.

Plot
A strange new teacher is introduced to class 3-E at Kunugigaoka Junior High School. The teacher is a round-headed, tentacled alien capable of moving at speeds of up to Mach 20 and whose color changes depending on his mood. Prior to introducing himself to his new class, he managed to carve out a large chunk of the moon to become a permanent crescent moon. In a year, he plots to destroy the earth, but decides to teach a junior high school class in the meantime for reasons unknown. With this strange alien having effectively taken over the world, the government reluctantly complies with his request on the condition that he does not harm his students.

Affectionately, the students of class 3-E call him Korosensei, the unkillable sensei. These same students greet him everyday with an assassination attempt in their journey to become professional hitmen, to save the world by eventually murdering their own teacher, and to earn 10 billion yen from the government.

Official

 * Assassination Classroom website
 * Japanese Shonen Jump Assassination Classroom website
 * English Shonen Jump Assassination Classroom website
 * Japanese Shonen Jump Assassination Classroom feature page
 * Assassination Classroom Twitter website
 * VOMIC website