If you loved Ocean Waves, try The Princess and the Pilot
A bridge between a film you've already seen and one most people haven't. The Princess and the Pilot has roughly 6.9× fewer votes than Ocean Waves — 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.
What they share
Theyboth carry the bittersweet, tender mood tags, and they sit in Animation / Drama / Romance territory. If that's the register that drew you to Ocean Waves, the second film will land in a comparable space — through a different lens.
What The Princess and the Pilot is
Here's an anime that tries to launch a few love triangles even as it depicts total war. A mercenary pilot of mixed race is tasked with flying a princess through enemy territory for an arranged marriage. It's not exactly *Casablanca* in the air, but it gets the job done.

