Solo Leveling (en) follows Sung Jinwoo, an E-rank hunter in a world where gates connect to dungeons filled with monsters. After a deadly encounter in a hidden double dungeon, he gains a mysterious power that allows him to level up, the only person in the world who can grow stronger like a character in a game. The story tracks his transformation from the weakest hunter to an unparalleled force, uncovering dark secrets about the gates and his new abilities. Readers enjoy it for the satisfying power progression, intense action, cool art, and the thrill of watching an underdog become overwhelmingly powerful.