Rejected and Pregnant: Claimed By The Dark Alpha Prince - Chapter 17: Crush them using me

This is a story about the protagonist getting the system, going crazy in the biochemical apocalypse, producing aircraft and tanks, destroying zombies, saving good people and killing bad people.

- Description from novelbuddy

--Warning: This story contains graphic scenes of violence and bloodshed. No one under 18 is allowed---To not get confused by the end chapters, read Fallen Chronicles first----0---Have you ever pondered the mechanisms behind the Demon King's power system? Wondered how they attain such strength at the game's outset, or why they seem to advance in levels more swiftly and efficiently than the heroes?Well... this is what our MC will discover very soon.---0---

Korean entertainment novels, I don’t like it.

There are already three copies, character protection, never TJ.

- Description from novelbuddy

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!