If you loved Assassination Classroom, try Assassination Classroom: Graduation
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
What they share
Both films are directed by Eiichiro Hasumi, and they both carry the playful mood tag, and they sit in Action / Comedy / Science Fiction territory. If that's the register that drew you to Assassination Classroom, the second film will land in a comparable space — through a different lens.
playful
What Assassination Classroom: Graduation is
A teacher made of yellow tentacles shows up with a moon-shaped ultimatum. He teaches the class everyone had given up on while keeping the planet from getting blown to bits. By graduation, the kids realize he had been teaching them to fail upward all along.
Ask 
ChatGPT
Claude
Grok
Le Chat
Perplexity
for a deeper bridge
ChatGPTClaudeGrokLe ChatPerplexity