This is a different country, and different culture. It's been in the news for years now that Koreans are literally working themselves to death. To the point they just fall over and die. There's been many protests trying to get the government to step in and change things, but so far capitalism has done its thing and people are still dying. If they don't keep working, they lose their livelihoods. Some people work 80 hour work weeks in dangerous conditions, just to barely afford an apartment not much bigger than a closet. There's no other option for them, except to starve.
If you want more context, there's quite a few good documentaries on YouTube about the issue.
Damn, all this time Hexbear was actually getting paid?