If you loved Key of Life, try BAD FILM
A bridge between a film you've already seen and one most people haven't. BAD FILM has roughly 11.7× fewer votes than Key of Life — 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
Theyboth carry the foreign gem mood tag, and they sit in Comedy / Crime territory. If that's the register that drew you to Key of Life, the second film will land in a comparable space — through a different lens.
foreign gem
What BAD FILM is
Ah, another film about the end of the world. This one involves rampaging hordes and rampant hormones on the Tokyo metro. It certainly gives the impression that something happened.

