In Solo Leveling season 2, the Red Gate arc sees Jin-Woo accompanying his sister's friend to a C-Rank gate that unexpectedly becomes a dangerous Red Gate. This arc is notable for showcasing Jin-Woo's Shadow Army in action for the first time, as he dominates the Ice Elf, Baruka. The anime adaptation covered this arc in two action-packed episodes, streamlining some dialogue but maintaining the high-quality fight sequences.
The Demon Castle arc in Solo Leveling sees Jin-Woo tackling an S-Rank dungeon, confirming his strength has reached that level. He discovers the recipe for the Holy Water of Life, a potential cure for his mother's illness, which motivates him. This arc also marks the point where the Hunter Association begins to suspect Jin-Woo is concealing his true power. The anime adaptation will likely cover this short arc in two episodes.
The Retesting arc in Solo Leveling sees the Hunter Association finally forcing Jin-Woo to undergo retesting. He is officially ranked as an S-Rank Hunter, causing a stir and attracting the attention of powerful guilds. This arc, while not action-heavy, is significant for revealing Jin-Woo's true rank and introducing his father. As the shortest arc (four chapters), it will likely be covered in a single anime episode.
The Hunters Guild arc of Solo Leveling features Cha Hae-In becoming intrigued by Jin-Woo. While he's working as a miner in an A-Rank dungeon while awaiting his S-Rank license, she observes him. She then follows him on another raid, witnessing his solo defeat of High Orcs and the boss, Kargalgan. This action-heavy arc spans 11 chapters and will likely take 3-4 anime episodes to adapt.
Jin-Woo returns to the Demon Castle to collect the final ingredient for the Holy Water of Life and confront the boss, Baran, the King of Demons. Despite a tough battle, Jin-Woo prevails, aided by the demon princess Esil Radiru. The fight with Baran is a major highlight of the season. This arc will likely span four episodes. While the season might end here, there's a possibility it could tease the upcoming Jeju Island arc, though that will likely be saved for Season 3.