Do you know how this world ends? Become the hero and defeat the 72 Demon Lords. The game that boasted as the absolute hardest strategy game, 『Dungeon Defense』. I used to be the ‘hero’ that had accomplished everything in this game, but after answering a suspicious survey, I found myself in the game as the weakest Demon Lord, 「Dantalian」. With only my eloquent tongue and my memories of conquest as a hero—. In order to survive as Dantalian. I shall tear this world apart.