If you loved The Classic, try Colors of Wind
A bridge between a film you've already seen and one most people haven't. Colors of Wind has roughly 6.5× fewer votes than The Classic — 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 Kwak Jae-yong, and they both carry the bittersweet, foreign gem mood tags, and they sit in Drama / Romance territory. If that's the register that drew you to The Classic, the second film will land in a comparable space — through a different lens.
What Colors of Wind is
A film that wants to be both a meet-cute romance and a missing-persons thriller. A man travels to Hokkaido to find his lookalike, a magician, and instead learns about lost love. The déjà vu of it all perhaps intentional.

