MTL - Comprehensive Manga: a Journey Through the Supreme Being - Chapter 107

From the end of the world to the ancient times, before Gu Yundong could breathe a sigh of relief, he found that he was on the way to escape from the famine.

And their family was being kicked out by their grandparents from the fleeing family team, and everyone else was watching from the sidelines.

The father is missing, the mother is stupid, the little radish-headed brother and sister have bony heads and huge heads, and the dying Gu Yundong only feels a toothache.

No way, just roll up your sleeves and do it.

Doing business, opening shops, and buying fertile farmland, Gu Yundong’s life is going well. If there is no one around who is staring at her and wants to marry her back home, she can go to heaven.

- Description from novelbuddy

Lieutenant Jack Fritz is a self centered American man of German descent. He like many joined the United States Navy in hopes of getting an easy life and easy money. In fact getting money and taking it easy is all he has ever really wished for in life.However life seems to have other plans in-store for Jack as he suddenly finds himself at the beginning of World War 3. Though his fight does not last for long as he is suddenly blown to bits by a missile and sent into the afterlife, but instead of going to heaven Jack is dragged to another place where he is given another chance at life by some fiery demon for a price.Having been given no other chance Jack does as the demon says and earns himself life again. Though he doesn't return to his original world, but a medieval one. With no guidance and no higher purpose given to him he simply decides to do the best that he can within this new world of his. This time he will for sure earn that perfect life of his and possibly a lot more.But little does Jack know his fate is not his own and there are many sinister things in-store for him. Also the world he finds himself in is not a safe or simple medieval world, but one beset by dangers from all sides that are already little by little driving humanity towards its extinction.

To save a doomed fantasy world, I killed the main characters, then destroyed the game world, and fell into another timeline as the academy's top seat and rival to the protagonist.Now, I'm trying to save the world and steer it towards a better ending…But I'm the final boss.