If you loved The Tower, try May 18
A bridge between a film you've already seen and one most people haven't. May 18 has roughly 6.7× fewer votes than The Tower — 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 Kim Ji-hoon, and they sit in Drama territory. If that's the register that drew you to The Tower, the second film will land in a comparable space — through a different lens.
What May 18 is
The democratic protests in Gwangju escalate when soldiers seize the city accusing communist plots. Civilians arm themselves to fight back. The uprising becomes a battleground for survival and resistance.

