Solo Leveling is based on the popular South Korean webnovel, "I Alone Level Up", published in 2016. The story has received much praise from committed readers and is now a renowned manhwa series with a large fan base. In Solo leveling, the main protagonist starts out as a weak, E-Rank hunter but eventually metamorphs into an S-Rank hunter with tremendous skills. Certainly, watching Solo Leveling's protagonist evolve his battle skills and abilities is one of the story's best developments since it's the focal point of the series.