Past Life Returner

In a world crawling with monsters and dungeons, Na Sunhoo and the other Awakeneds fight to protect humanity. But after he is killed in a deadly battle, a screen appears. [Initiate Time Regression?] Now with a second chance at life, Sunhoo returns to the past, determined to make as much money as possible to buy the land the dungeon is on and destroy it before the monsters can appear. With innocent lives at risk, can Sunhoo strike it rich and vanquish the monsters once and for all?