If you loved Boy A, try Intermission
A bridge between a film you've already seen and one most people haven't. Intermission has roughly 3.0× fewer votes than Boy A — 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 John Crowley, and they sit in Crime / Drama territory. If that's the register that drew you to Boy A, the second film will land in a comparable space — through a different lens.
What Intermission is
Here's a film that hopes to do for Dublin what *Trainspotting* did for Edinburgh. When a young couple decide to take a break from each other, their orbit quickly expands to include bank robbers, corrupt cops, and various other lowlifes. It's not quite a cultural touchstone, but it is a pretty good yarn.

