Obviously, he had returned to Earth before it entered the Autoborn Stage, met his mother again, and returned to the woman he loved. And that was more than enough compensation for his decision not to move to the next stage called Mamont.
But the earth, which stopped developing without any further change or evolution, was a kind of prison for him. But he put up with it over and over again because that was his own choice. So it was only natural for him to face the consequences.
Then he fell asleep again because he had nothing else to do other than that.
Even though he called it a deep sleep, it was more like intentionally blocking his consciousness.
Therefore, he did not really dream anything while hibernating for 3,000 years.
But he could meet his lover Haein Song after a really long, long time.
"Honey, I love you."
And he also met his mother.
"Son, cheer up!"
After that, he met many others who had relationships with him in one way or another when they were alive.