If you loved Love Live! The School Idol Movie, try Crayon Shin-chan: Crash! Scribble Kingdom and Almost Four Heroes
A bridge between a film you've already seen and one most people haven't. Crayon Shin-chan: Crash! Scribble Kingdom and Almost Four Heroes has roughly 3.3× fewer votes than Love Live! The School Idol Movie — 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.

Love Live! The School Idol Movie

Crayon Shin-chan: Crash! Scribble Kingdom and Almost Four Heroes
What they share
Both films are directed by Takahiko Kyougoku, and they both carry the cozy, foreign gem, playful mood tags, and they sit in Animation / Comedy territory. If that's the register that drew you to Love Live! The School Idol Movie, the second film will land in a comparable space — through a different lens.
What Crayon Shin-chan: Crash! Scribble Kingdom and Almost Four Heroes is
This one asks, what if a child's doodles could save the world? The floating Rakuga Kingdom, powered by doodles, sets its sights on Kasukabe to generate more energy. It's up to Shin-chan and his own drawings, the Almost Four Heroes, to stop them. It certainly delivers some frenetic animated battles.