If you loved Assassination Classroom the Movie: 365 Days' Time, try Slam Dunk 3: Crisis of Shohoku School
A bridge between a film you've already seen and one most people haven't. Slam Dunk 3: Crisis of Shohoku School has roughly 4.1× fewer votes than Assassination Classroom the Movie: 365 Days' Time — it's a deeper cut, not a mainstream recommendation. Here's what they share, and what the second one does that the first one doesn't.

Assassination Classroom the Movie: 365 Days' Time

Slam Dunk 3: Crisis of Shohoku School
What they share
Theyboth carry the playful mood tag, and they sit in Animation / Comedy / Drama territory. If that's the register that drew you to Assassination Classroom the Movie: 365 Days' Time, the second film will land in a comparable space — through a different lens.
What Slam Dunk 3: Crisis of Shohoku School is
The third outing finds Shohoku nursing post-Kainan wounds and a freshly cropped Sakuragi. An exhibition against the mysteriously stacked Ryoukufu is supposed to rebuild morale. In reality, it just raises the odds they’ll get dunked on again.