Assassination Classroom (Japanese: 暗殺教室, Hepburn: Ansatsu Kyōshitsu) is a Japanese science fiction comedy manga series written and illustrated by Yūsei Matsui.

The series follows the daily lives 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.

A powerful creature claims that within a year, Earth will be destroyed by him, but he offers mankind a chance by becoming a homeroom teacher where he teaches his students about how to kill him. An assassination classroom begins.

The students are considered “misfits” in their school and are taught in a separate building; the class he teaches is called 3-E. The series was serialized in Shueisha’s Weekly Shōnen Jump magazine from July 2012 to March 2016 and compiled into twenty-one tankōbon volumes.