If you loved Kundo: Age of the Rampant, try The Unforgiven
A bridge between a film you've already seen and one most people haven't. The Unforgiven has roughly 6.3× fewer votes than Kundo: Age of the Rampant — 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 Yoon Jong-bin, and they sit in Drama territory. If that's the register that drew you to Kundo: Age of the Rampant, the second film will land in a comparable space — through a different lens.
What The Unforgiven is
Full Metal Jacket if set in the present-day South Korean army. A young man struggles to readjust to civilian life after serving, but duty calls again. A bleak look at the aftereffects of institutionalized bullying.

