Gave up around chapter 32 after seeing the writing on the wall.
Our MC, the supernaturally-unnoticeable loner background character Yu Ilhan, is the only person who is NOT transported to some sort of fantasy world as God prepares Earth to turn into an RPG-world of levelling up and fighting monsters.
Accompanied by an angel and unable to level-up on an Earth that lacks the required mana and "Akashic records" system, he trains his body and learns martial arts.
Then the promised wait of ten years keeps on stretching and stretching, so after a thousand years of waiting, our non-catatonic, perfectly unchanged and unaffected MC (sic, this is not sarcasm) has read all the books in the world and knows even f****ng Finnish (though the author got the single word he spoke wrong; should have been "hyvä", not "hyvää", which is the partitive form).
The tutorial period finally ends (ten years for everyone else), so the world is reset and the people return, with knowledge that soon shit is going to hit the fan with monsters and misc. things happening.
What ensues is a blatant and boring power-fantasy without a seeming point as our perfect MC easily destroys monsters X levels above his own, has nearly zero interaction with people other than his exposition fairy, wows the angels with his magnificent powers of blacksmithing and creating magical equipment and fixing God's mistakes. So much potential down the drain.