A gigantic tower of a thousand floors pierces the Earth. From now on, the world will never be the same. Now it exists in the paradigm of an RPG game, and the surviving people, having obtained the Power, gain the ability to change it. Everyone rushes to level up their skills to survive. The main hero, being a professional game designer, understands that this new world is built on a game system he worked on for many years. And now he has to fight the Overlords of dimensions in his own game. Intrigued? Then listen…