Nozomanu Fushi no Boukensha
Lento Fayner is an adventurer who has been within the copper rank for about ten years. He’s been dreaming of promotion all his life.
One day Lento encounters a secret passage in the maze, and despite the fact that it was logical to prepare from the beginning, and only then conquer the unexplored space, the man decides to take a risk.
Well, the unknown truth opened up in all its glory: Lento ate the dragon. After that the young man wakes up, but now he looks like a skeleton. All that remains for the former adventurer is to develop as a undead. Will he like the new role?