Guns & Talks is a Korean crime-comedy about a team of 4 assassins (two of whom are brothers) who try to attempt a perfect kill for the client before a detective catches up with them. It is, as you might expect, a bit wacky, a bit dark, and a bit good.
Bin Won plays what could be considered the protagonist and his slightly more naive outlook on life is what leads to most of the humour in the film. Not all the humour, as there's plenty of dark comedy particularly from some of the assassinations.
The characters are just varied enough to make them all interesting with performances to match. It escalates towards a stupendous culmination that makes the whole film worth watching for on its own, even without the delightful 90 minutes that precedes it.