Read Manhwa SOLO LEVELING
A long time ago, there was a place called the "gate" that connected the real world with the monster world. Ordinary people were able to get power to fight monsters in that gate. They are known as "Hunters". Not all Hunters are powerful. My name is Sung Jin-Woo, an E-rank hunter. I'm a hunter of the lowest rank that has to risk my life in the weakest dungeons. In order to get money, I had to fight in low-level dungeons... at least until I found a hidden dungeon with the hardest difficulty within D-rank dungeons! When I accepted death, I suddenly got a strange power. It was a quest log that only I could see and a secret to leveling up that only I knew about. If I trained according to my quests and hunted monsters, my level would rise. Changing from the weakest Hunter to the strongest S-rank Hunter!