You are reading Only I Know About "Leveling Up" in This World manga, one of the most popular manga covering in Action, Adventure, Fantasy genres, written by at MangaBuddy, a top manga site to offering for free. Only I Know About "Leveling Up" in This World has 1 translated chapters and translations of other chapters are in progress. Lets enjoy. If you want to get the updates about latest chapters, lets create an account and add Only I Know About "Leveling Up" in This World to your bookmark. A world where the worth of one's life is decided by one's Level.Theo, an S-Rank adventurer, had reincarnated thousand years later in a future where the people had forgotten about the power called "Level Up". In this world where a person would be Level 1 at birth, humanity is persecuted as the weakest race and the people lived everyday while fearing the danger of monsters. However, in their midst only Theo, who was chosen to be a sacrifice for the monsters, knew that humans can become the strongest because only they have the ability to Level Up.