Forgotten Title MC is a regressor. He wakes up getting punched by an old bully

Korean novel

Pretty sure he is getting punched at the gym. He knocks the guy out and prepares for the apocalypse that happens at midnight, mainly preparing weapons and salt, because salt is the monsters weakness. Meets up with the bully later, but hes a small fry.

He has to clear monster lairs in the subway, and killing monsters has a small chance to give pearls(?) that allow you to move to the next zone of the tutorial. The world is most similar to Omniscient Reader’s Viewpoint among the books ive read, with administrators that you can buy stuff off with points.

Cannot seem to find it using different tags

 

Arena?

 

Doesn't appear to be, just gave the first couple of chapters a browse. I'm seriously wondering if maybe its not on this site, even though I know its a korean novel.

I read it a few months ago, but it only had ~20 chapters

I found it!! It was Levelling with the Gods. I'm honestly really tilted, I've literally spent hours searching for this!