Ansatsu Kyoushitsu

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. * Based on Matsui Yuusei's comedy manga.