20 years ago, a huge tower that pierces the sky suddenly appeared in Tokyo Bay. And the dungeon weapon with mysterious power excavated from that tower changed the world. The equipped item is said to be able to give various abilities to the wielder such as impervious to bullets, can fly through the air, and even crushes rocks with bare hands. People who explore the dungeon have such dream like obtaining power-giving equipment and in search for it. The main character of this story focuses on Kenya Mitsurugi , one of the boys who also dreams of the same profession. However, Kenya was facing hardship along the way. He was being ridiculed as incompetent,exiled and fired due being possessing a profession of an alchemist An Alchemist was a profession that be considered an incompetent profession which resulting many people to be cast away. As a result, Kenya gave up on his dream. However, Kenya’s world changes completely with the power of an awakened alchemist.　 The hero who became the only one in the world who can evolve dungeon weapons rises with that power.　　　 This is a story full of dungeon adventure, dungeon encounters, and dungeon success.