The Final Moments of Assassination Classroom: Book 20 by Ana Artz
*Spoiler Warning For Book 20 and Major Parts of the Series*
Assassination Classroom by Yusei Matsui follows the journey of this yellow octopus-like creature, Koro Sensei, and his students. However, this isn't a regular classroom, it's an assassination classroom where ethe students have to team up and kill their teacher. Why did a yellow octopus become a teacher and why does he have to be killed by his own students? Well, if he isn't killed by the last day of the school year there is a large chance that he will explode and take all of earth with him. The government are all working to kill him but its near impossible as he moves at Mach 20. The only agreement that they have come by is that he will teach, and his students will try and kill him. Throughout the series there have been a number of new challenges, school trips, new assassins being sent in, and many more foes but Koro Sensei always finds a way to make it a teaching opportunity.
His teaching approach is one of the many ways you can see how he cares about his students. The class that he teaches are known as the "losers" of the school. This is the group that are left behind, but he makes it his mission to help them achieve greatness and climb to the top of the extremely competitive academic ladder. He understands that each of his students is unique and learns in a different way, so he uses his speed to write individual lessons plans and guidebooks for each student. Koro sensei also makes other versions of himself with his speed which can work as "Speed tutors". He begins to do this in the second book and at first there are maybe two versions, but as the series progresses you can slowly see how much he refines his work. In the end, there are 10-12 versions that can easily communicate and work with the students. So many hours, dedicated to making his class better.
Koro Sensei's smaller moments are often lesser known, but still show his kindness and dedication. For example, when he first sees that his students came to save him from a dangerous situation, he prioritizes their safety completely disregarding their own. In the early phase of book 20 a student dies because of an attack the military launched that missed him. He reveals that he has been training in the act of reviving students because he knew that this would happen. For the rest of the students Koro Sensei turns that situation into a lesson so they could learn from this seemingly tragic experience.
When Nagisa (A student of Koro Sensei's) is about to make the killing blow Koro Sensei stops him. He can see the anger and sadness on Nagisa's face, he says "You can't kill someone with those feelings. Calm down. Put a smile on your face." because he knows that if Nagisa kills him in this way Nagisa and the rest of the classes final memory with Koro won't be happy. It'll be something that forever haunts them. Koro Sensei's wish, dying and not, was always to make the lives of his students better.
Koro Sensei -----