Edit: apparently this is a very common form of Japanese storytelling called an isekai. There are 8 billion people in this world, no idea can be original. And sometimes you miss out on things many other people know. I’m clearly one of today’s lucky 10000.
Pending Train is pretty darn close to what you’re describing. I only got through the first episode, it falls prey to a lot of annoying little tropes, but it’s a cool concept for sure.
It is, yeah! I’d never heard of that, thanks for sharing.