Luo Nan transmigrates to the Middle Ages, becoming the young son of a wealthy baron, with both parents alive, a younger sister, and a house of his own.
The only flaw in his ordinary life is that every night he dreams of countless indescribable monsters chasing him until he has nowhere left to run.
After enduring it for as long as he can, he finally throws caution to the wind and draws his sword against the monsters!
"You think you can bully me in my own dreams?"
The Demon Bureau, the Holy Church, the Blood Cult, the Men in Gray... The powerful members of hidden organizations watch the Wall of the Abyss. The monsters' restlessness confirms that the prophesied apocalypse is drawing near.
The six-winged angel Lucifiel arrives at the wall. After a long silence, she murmurs, "Why do I get the feeling they're desperately trying to come over to our side because they're hiding from something in terror?"
"With the humblest of dreams, I offer this to the sobs and roars of the night."
"My sword exists only to reclaim the most ordinary life."
"The road home is gone, and my homeland has burned. Then I'll build an ideal country with my own hands!"
The youth reforges his broken sword in a dream, returns to the mortal world, and fights until madness consumes him.
(Not a straightforward invincible protagonist story. Original worldbuilding, slow-paced. Read with caution.)