If you loved Ocean Waves, try Kimagure Orange Road: I Want to Return to That Day
A bridge between a film you've already seen and one most people haven't. Kimagure Orange Road: I Want to Return to That Day has roughly 11.5× 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
Both films are directed by Tomomi Mochizuki, and they both 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 Kimagure Orange Road: I Want to Return to That Day is
Here's a film that understands the assignment. It's college-application time for Kyosuke and Madoka, which means campus visits and some romantic stress. High-school junior Hikaru also inserts herself into the mix. This one hits all the expected anime beats.

