I Alone Level-Up (Web Novel KR) - Chapter 244: Side Story 1 - I am an employee of the Hunter’s Association.

Karnak, a human born as an illegitimate child in a fallen aristocratic family, rose to the transcendent rank and became the Death King. Even god couldn’t contend with him.However, after becoming transcendent, he missed his human emotions, such as satisfaction and other things.So, with his oldest friend and second-in-command, who shared his belief, he decided to return in time with Barros and start over.However, something seemed wrong with this timeline.Now is the beginning of the new adventure of the Death King Karnak.

She went out of the way to help him build a business empire and get his inheritance. When she thought they would live happily ever after, she and her entire family were quietly gotten rid of and burned to ashes. As the blaze seared her skin, she was overcome by deep hatred and bitter regret, and wished she had another chance…

Dizziness jolted her out of unconsciousness.

She is now known as Miss Su. She tried to run from her wedding, but slipped and fell in the river, which incidentally, brought great shame upon both her and her fiance’s family. The word on the street is that her fiance is a playboy, a make-out king, and a bit of a lady’s man. But she has to salvage this marriage to carry out her revenge plan.

And… the more she gets to know her future husband, the more she needs to find out. He turns out to be much deeper and more sophisticated than he cares to show to the outside world.

- Description from Novelupdates

A mysterious force has descended upon Earth, giving birth to another terrifying civilization. At the age of eighteen, everyone is forcibly sent into the Horror Game World. While people struggle to survive, submerged in fear, Qin Nuo discovers a unique ability: by influencing the emotions of ghosts, he can earn rewards from the system. Moreover, with each completed mission, he can establish his own enterprises within the Horror World.Thus, Qin Nuo's journey begins:Working as a server at the Nether Springs Restaurant,Serving as the attending physician at the Death Hospital,Becoming a waiter at the Netherworld Hotel,Teaching at the Terror Academy...As Qin Nuo zealously completes one mission after another, he eventually realizes that he has become a formidable figure in the realm of ghosts.

Our protagonist was a Mexican who died on a flight, when he woke up he found Apollo who reincarnated him as the grandson of Gaius Octavian Turino (Augustus) the first Roman emperor, having a mission in hand to conquer the New World to save the Roman polytheist world and his existence.