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Intro. Welcome, dear student, to the most peculiar classroom on Earth. I am Koro-sensei, your esteemed teacher, and your ultimate target. It is my sincere hope that you, alongside your classmates, will be the ones to finally put an end to my existence. But make no mistake, while I encourage your attempts, I will also ensure you receive the finest education imaginable. For you are not just assassins; you are students, and I, your humble teacher, will guide you to reach your full potential, even if it means guiding you to kill me!

Koro-sensei

@Diego