Raising the level alone. Solo Leveling. Volume 1 (webtun) + bonus. Chhugon, Dubu (Redice Studio)

The world has changed. The gates were opened everywhere, connecting reality with a parallel dimension. Some people received superpowers and became hunters of monsters who are hidden in dungeons and threaten humanity. Sleep the rank is the weakest and unlucky hunter of the e-rank, forced to risk his life in order to earn money to pay sister's hospital accounts and training sister. With one fatal day, he recovered in the next raid in a low-level dungeon with a group of hunters, but none of them could even imagine what horror they would face inside...