In a World Where Levels Rule

In a World Where Levels Rule is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on the fastest updating comic site. The Summary is

One day, the high school boy, Tohru, was summoned by an aristocrat to [a world where levels rule]. Upon discovering that Tohru's level was the absolute lowest, he was then treated as a slave and trapped in a high-level dungeon. He vowed to defeat the fearsome monsters in the high-level dungeon, level up higher than everyone else, and return to his original world.