Assassination Classroom

When an octopus-like alien destroys part of the moon, Nagisa Shiota and the rest of the students of E Class of Kunugigaoka Junior High School are given the task to kill him by the government after he decides to act as teacher for their class otherwise he will destroy the Earth once the school year is over.

ENGLISH SUBTITLE:

http://subscene.com/subtitles/assassination-classroom/english/1192178