The Savior is just a 3-Year-Old - Chapter 5: You Were Abandoned Seven Times

As Shin Youngwoo has had an unfortunate life and is now stuck carrying bricks on construction sites. He even had to do labor in the VR game, Satisfy!

The Immortal Path led to Longevity and Sovereign was heading in ease. When the Longevity was no longer in ease, all living beings were just prisoners. Conspiracy, internal strife, and the invasion of the others, all of it emerged together. 

In such a world, there was such a young man. He made his way upstream, stepping on blood, defying the emperor, destroying the various kings, and slaughtering his way through the hundred clans to form an Immortal Path towards the throne of Sovereign! The Immortal Path was endless, while the Sovereign was limited. He used his blood to forge his immortal legend.

- Description from Novelupdates

mc gets transmigrated to Fallout New Vegas with the merchant system. let the questionable adventure begin.

Fang Ka, a man who became a necromancer in another world, made a shocking discovery: his consciousness was still linked to the internet networks of his previous life. By connecting online users’ minds to the undead he summoned, he turned what should have been a grim army into something far more dangerous—and unpredictable.