Assassination classroom

The students in class 3-E are the misfits in their school, but their teacher is a powerful, tentacled extraterrestrial who has already damaged the Moon and threatens the Earth, and they have been assigned to assassinate him.

The latest addition to the misfit students of Class 3-E is a Norwegian robot specially designed to assassinate their teacher, but finds herself severely lacking in social skills.

Nagisa risks it all in an attempt to take down the mastermind behind the biological attack on his classmates, while one of the students defects from Class E--and turns his back on his assassination target.

When Isogai breaks school rules, Gakushu and the Big Four use his secret to force 3-E to participate in a bizarre sports day contest, and when some 3-E students accidentally injure a day care owner, they're ordered to replace him until he recovers.

"The Grim Reaper sets up a lethal trap that buries Mr. Karasuma and Ms. Vitch alive. Will Mr. Karasuma's repressed feelings surface before he and Ms. Vitch do? And how will Mr. Karasuma face Death? Then, despite his vow to destroy the planet in March, Koro Sensei offers career counseling to his students. Nagisa's professional goal raises some serious issues. And finally, it's time for the next school festival showdown. Class A and Class E compete...

Several secrets from the past are revealed to Class 3-E, including what led Principal Asano to develop his harsh educational methods, one 3-E student's motivation for trying to assassinate her teacher, and the story of Koro Sensei's origin.

"Ever caught yourself screaming, "I could just kill that teacher"? What would it take to justify such antisocial behavior and weeks of detention? Especially if he's the best teacher you've ever had? Giving you an "F" on a quiz? Mispronouncing your name during roll call...again? How about blowing up the moon and threatening to do the same to Mother Earth--unless you take him out first?! Plus a reward of a cool 100 million from the Ministry of Defense!...