Only I Level Up in This God Forsaken World

In this world where hunters with various magic powers battle monsters that invade through other dimensions known as "Gates". Then one day, 10 years after the "The Great Disaster" a "Tower" appears out of thin air and after 3 months of its appearance a menacing timer appears on top of it like a doomsday clock, as the time to its countdown nears. Follow the story of Kim Ryu an orphan graduate high schooler and an aspiring Hunter who wants to take revenge on the monsters that nearly took his life years ago, he appears to be carefree and easygoing but is full of despair from inside because of his savings that he saved from working overtime which he all used in the Hunter test he failed. Then one day when going home from work in an incidenexperience's. 1 Chapter as big as 2 chapter's will be released every 2 days Over Several thousand years ago a strange phenomenon that turned most of mankind into dust except a selected few for reasons that are unknown later came to be known as the Cataclysm. 5000 years After civilization fell, the remaining population from being savage hunters to building walled cities had managed to survive over the last few decades, in the year 902 of the new era calendar humanity is trying its best to advance from the Stone Age back to the modern age until small but strange black portals started appearing out of nowhere. Eric Yeager a high schooler and an aspiring scientist had lived his life peacefully until the Cataclysm giving him endless slumber. One Day After hearing a strange voice he woke up from endless darkness only to find himself surrounded by a world totally different from the one he was used to live in. Dumbstruck by the new reality in front, he resolves to find out who turned humanity into dust and why? and to use science to help rebuild the world until one day he comes across a strange black portal that brutally changed his life forever. [Welcome Player Eric]