Ansatsu Kyoushitsu: Jump Festa 2013 Special

A strange tentacled creature suddenly vaporised 70% of the moon in an explosion.

It can slink around at 20 times the speed of sound; it also has a 10 billion yen price on its head.

Yet, for some reason, it ended up becoming a teacher for a middle school class at the beginning of the school year.

The students now have until graduation to assassinate their teacher, or it will destroy the Earth as well.

Note: Part of the Jump Super Anime Tour 2013 (ジャンプスーパーアニメツアー2013) event, which traveled to five cities throughout Japan from October 6 to November 24, 2013.