Assassination Classroom is a 2015 Japanese school science-fiction action comedy film directed by Eiichirō Hasumi and based on the manga series of the same name created by Yūsei Matsui.

However, Class 3-E is actually a cover up for the Japanese government in their attempt to kill Koro-sensei, a tentacled mutant creature that apparently is responsible for the Moon's destruction.

Before the finals, Koro-sensei promises that the top scorers of the five academic subjects (Chemistry, English, Home Economics, Japanese, and Maths) will be awarded chance to cut his rubber-like tentacles, which will greatly slow him.

Nagisa and Karma team up to incapacitate Itona, now working for Takaoka, by luring him into open rain and subsequently cutting his tentacles.

Seeing that Koro-sensei is vulnerable, the government takes him and proceeds to do a public execution in front of his grieving students.

However, he manages to survive the attempted killing and is allowed to continue teaching Class 3-E for the next term, with Itona now enrolling permanently.

"[10] The anime fanzine Otaku USA was more negative, saying: "As a piece of storytelling, Assassination Classroom felt more like a series of non-cohesive chapters than a fleshed-out whole, probably thanks to its manga origins.