Dungeon Juinnim

A man named Juyoon Oh attempts to secure a full-time job when he jumps into a river to rescue a child, risking his life in the process. On the verge of death, he is approached by a goddess who offers him a second life, but not as a powerful hero or mage. Instead, he is reborn as a powerless, talentless creature known as a "brick larva." His journey ahead is difficult and filled with challenges as he begins a long path toward becoming a true hero.