Zeon, a solo adventurer, died while trying to clear a high-level dungeon alone. By chance, he was turned into an undead and condemned to endlessly roam the dungeon. But, while he did, he defeated monsters, and gained tremendous power, and evolved! After regaining consciousness, he realized that he’d become the strongest undead. Humankind became aware of the birth of a new disaster, and was frightened and began to despair. “It’s the end of the world…!” They said. Although, said disaster had no intention of hurting anyone… It’s the start of a refreshing, humorous story about a kind-hearted undead and the people that fear him!