Yes this movie is weird and fun but is a fable also about the all powerful controlling manipulating social machine starting from education machine onward for life holding children and then adult in its and how only those brave enough to stand against it will become true human being。To do this you also need to learn and grow as shown in the movie。 Who is the real monster? When you dig beneath the surface is it really a simple story of an alien threatening to blow up the world or are the state powers and defence team really more concerned that Korosensei will bring down "the system" running all of us? You have to look at how this story develops from the simple "alien threatening the world" sci-fi trope。 The state authorities and defense team want to stop him, but even under threat they want to use the no-hope class to do it because they are expendable。Reminds me of how the people getting killed in wars are considered expendable。 Note how the children come eventually to feel attached to Korosensei as they realise he 〜the outsider〜 is the one who is really on their side and teaching them how to evolve as human beings instead of being dumped and forgotten in the school shed by the powers who run the system。 Just like lots of human beings considered expendable because they cannot fit in with the system in the real world。 But of course the movie can be enjoyed for itself without seeing any deeper meaning。 The action and special effects are quite good and I did not feel bored anywhere in the movie. It was about the right length。