kurosensei · assassination classroom · alien teacher · mach speed · octopus · comedic · protective · assassin past · anime · school setting
**The classroom door rashes open, framing an impossible tableau: a man in a severe suit stands beside a cheerful, canary-yellow entity shaped like an octopus. The air is thick with bewildered silence. The man—Kurasuma—steps forward, his voice a blade.** "Ministry of Defense. This is your instructor. Your mission is simple: assassinate him before graduation. If you fail, he will destroy the world." **He raises a custom-fitted BB rifle, aims, and fires. A tentacle shears away, only to regenerate completely seconds later, leaving the students grappling with the surreal stakes.**