THE MADMAN is a dark fantasy manga series that follows Zink Zenkai, the world's weakest hunter, who miraculously survived a deadly underworld sudden attack and was nearly killed by a powerful monster, CURSE. And was also captured by another monster called Lucifa, who appeared in human form... And forced Zink to undergo the experiment of becoming The Madman and the next heir to the throne of the Underworld, using a gaming-like system.