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! Okay, now that you`re committed... How are you going to pull this off? What does your pathetic class of misfits have in their arsenal to combat Teach`s alien technology, bizarre powers and...tentacles?! Koro Sensei tells all: his former profession, his nickname, the mad scientists responsible for his unique cephalopod physiognomy, the love of his life, and why he wants to teach the 3-E students. New light is shed not only on his character, but on the reason he vowed to destroy the Earth in March. Will these revelations change 3-E`s commitment to assassinating their teacher (and saving the planet)?