Ore dake Level ga Agaru Sekai de Akutoku Ryoushu ni Natteita  

I Become a Rogue Lord in a World Where Only I Level Up, I’ve Become a Rogue Lord in a World Where Only I Can Level Up

In the game world of a strategic medieval role-playing game (RPG), Ryuuichi Hasegawa, who is considered the best player, is given a special bonus by the developer that allows him to be reincarnated into the game as Erhin Eintorian, who dies at the beginning of the story. Erhin now has only one day to save himself from being invaded by a hostile foreign power that threatens his domain. To do this, he must use his knowledge of the game and access to the leveling system that only he can use. However, Erhin faces a challenge because he does not have any functioning military at his disposal as a villainous lord. Can Erhin prevent his predetermined fate from occurring or is he destined to play out his own demise?

Ore dake Level ga Agaru Sekai de Akutoku Ryoushu ni Natteita began as a web novel on Shousetsuka ni Narou. The first official volume was published on November 11, 2020 by Kadokawa under the Famitsu Bunko label.The series has been published digitally in English as Only the Villainous Lord Wields the Power to Level Up by J-Novel Club since May 17, 2023.