The world of Solo Leveling primarily focuses on Hunters of South Korea, which is also where the protagonist of the story, Sung Jinwoo, comes from. This is to be expected, as it is a South Korean story written by a South Korean author, Chugong.

For years, since the awakening of his true powers, Sung Jinwoo has stood as the strongest hunter of South Korea and the strongest in the entire world. However, since the beginning of Solo Leveling: Ragnarok, the sequel to the original story, Sung Jinwoo has been absent, taking on the new role of stopping the Itarim. Since his departure, a new strongest has risen in South Korea who stands tall as the country's best S-Rank Hunter. This new strongest is Cha Hae-In. With her reawakened powers and the absorbed abilities from the Shadow Monarch, she has surpassed all other S-Rank Hunters and become comparable to a Monarch.

Solo Leveling’s main focus has always been the protagonist of the series, Sung Jinwoo, who started his journey as an E-Rank Hunter but quickly rose through the ranks after unlocking the power of the System and becoming the Shadow Monarch. All this was made possible for Jinwoo after his near-death experience in the Double Dungeon. Jinwoo quickly surpassed the S-Rank Hunters and even the National-Level Hunters, and eventually became a godly being.

We all expected Sung Jinwoo to play a major role in the sequel to Solo Leveling, called Solo Leveling: Ragnarok. Sadly, this story has pushed him to the side and sent him on a new quest.

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