Once Human, Now a Parasite - Chapter 20

The prospective college student Luo Ji, who is enjoying the last summer of the third year of high school, has undergone earth-shaking changes at this moment after accepting the invitation of the game friend and becoming the player of the game of “Civilization Rise”.
This is a war game between the world and the world, and it is a fierce collision between civilization and civilization!
To annex the five continents, sweeping across the three oceans, and see how Luo Ji led his people, in this powerful enemy look around, the battlefield of the heroes to fight for a battle to the most powerful imperial civilization!

- Description from uukanshu translation

Zack “Kazz” Foreman once was a human from the earth when humans went through a dramatic change because of an event. This forced them to evolve into energy-based beings but was sucked into another dimension.

Forced to start living out lives on random worlds in a fractured dimension, Humanity is placed on the path of complete extinction.

This is controlled by a demon king at a place called The Center of Everything.

The Demons try to force Humanity's mark from every reality, so there are only demons, but the Demon King feeds from anger and pain. A constant tournament going at the center of everything to feed his hunger.

Kazz made it to that point once, but was tricked, refused entry to the tournament because he had offed a place one of the gods of the worlds.

Refusing to give up, Kazz goes back to the beginning to start again. To do this, Kazz must give up all of his memories to choke the flow of demons born fully grown from a pool of recycled souls.

This journey starts after he lives a solitary life trying to get stronger but not knowing why. The world Kazz is on is like our earth, but it was only a mimic of the earth we know.

Caught using steroids and about to give up and join the army, Kazz stumbles onto a cave in the ground. He is transported to a world filled with demons and monsters, and a human god named Hero is speaking in his head.

Hero, a person Kazz knew but was not friends with, followed him to help but was lost from him. Upon meeting Kazz, Hero offers him the Hero System to help him advance in this new world.

Kazz refuses after trying to get to the top and failing to use the easy route. This starts a series of frustrating events for both Heroes, but they learn to work as a team over time.

Kazz will meet misbegotten monster girls and demons that he agrees to take care of in this world, using the Ranching System. It only gives bonuses to the girls and skills to help raise them, but he will also learn to control the Elements with Shamanic abilities.

Hadrian, a street urchin, dies as collateral to a Mage battle. he reincarnates and awakens the ability to take over the Mind, Soul and Body of other beings.Bitter, He goes on a revenge against the Mages who'd caused his death. He realizes the problem does not end with them, but with the whole system and fate. He makes strong and powerful enemies on his journey to spite fate and the world.

76 years ago, the world changed. Or rather, should I say it evolved? Even so, this, “evolution” came at a price. Or maybe, the 'price' is what caused the evolution in the first place. What is this 'price', you ask? An invasion. Monsters from another world. Creatures we've only known through fork lore, myths and fantasy novels. They came from portals, known as Dungeon Gates, threatening all of mankind as we knew it. So in order to fight this catastrophe, the evolution happened. Half of the world's already large population Awakened as superhumans with Skills, Spells and Special Attacks all so they could pass through the Gates, enter the Dungeons and clear them. One by one. Thus marked the beginning of the Great Age Of Warriors.Name's Raid. And I'm one such Warrior. Now here's the kicker. I'm an F-Rank. The first one in history. Due to my low Mana Capacity, I could only choose one Class. The infamous Blacksmith Class. A Class no one even looked at twice, because weapons of mass destruction can easily be created with today's technology without much hassle. Now I'm faced with the reality of being seen as the weakest Warrior of all time, but you know what? To hell with it all. I'll make the most of the cards I've been dealt, even if those cards are...pretty shitty cards. I'll show all those High-Ranked Warriors what's what. They'll know my name whether they want to or not.Tag along for the ride if you're interested. Because once I get going, I'm not stopping until I reach the top.