MTL - They Are Not Human! - ~ Work related

Leon, a man who tragically died of exhaustion due to his sister's otome game, unexpectedly finds himself reincarnated as a young aristocrat named Leon Bartfort. However, he soon realizes that he is not alone in this body. Another mysterious entity already resides there, its voice echoing in his mind.Who is this second consciousness? Is it a friend, an enemy, or something far more sinister? Will they be able to come to an agreement to share control over the body, or will a fierce struggle for dominance ensue? Or perhaps their interactions will lead to unforeseen consequences?Intrigued? Then start reading!

He lived from BC to the Middle Ages, from the Renaissance to the Industrial Revolution, and from Cyberpunk to the Interstellar Age. He has been a king and a prophet, a knight and a nobleman, a versatile artist, a genius inventor…
This is a four-thousand-year human epic——
“To us four thousand years from now:
“Is the world at peace? Is famine extinct? Can people touch the stars? How long is the human lifespan? How far is the boundary of the earth? Human…do you remember us?”
——Excavated from Earth Age Tenth Century BC, Solomon Prayer Book.

- Description from novelbuddy

The world of an NPC born inside an online game was destroyed. Reborn in the real world, he gains a second chance. However, the monsters followed and destroyed he died again. Julian believed everything was over, only to have regressed to the day the game launched. Julian returned to Avalon not as an NPC, but a Player.Avalon's Fall was a VR Online Game created by the goddess.A game to help humans fight back against the six devils. She granted the Players a chance to evolve and enhance themselves in the real world. Because of his fragmented memories, Julian discarded his past. He then focuses on survival and happiness instead of saving the world. There were only two months before the first devil started his attack on the world.Thanks to the perk of his SSS-Rank Class Shadow Mancer and saving his ex-girlfriend, a powerful Sword Master, Julian changes the future. He took a different path, allowing him to surpass anything he ever imagined.Given the power to summon an army of undead in the form of shadow warriors. He overcomes the demons of his past. Supported by his party, they struggle to survive in the collapsing world, desperate to survive.The Devils eventually discovered his true potential and focused their gaze upon Julian. A title given to one existence, he who would rule over all darkness. The Heir of Shadows. The 13th Divine.Erebus.

After someone took my life away from me, I felt something or someone pulling my entire being together with my memories away from me and placing them into somewhere where it was cold and hollow. And when I thought that my life came back to me...

I realized that my new life as one of the dead had already begun...

"Who am I?"

Which path will this soul choose? A path of Perseverance or a path of Ruination?

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P.S: This is my first novel that I write so there is bound to be mistakes...so go easy on me xD