“Yue and I will protect each other. We are the strongest of all. We can defeat everything and go beyond this world.”
Hajime is a geek in school and his classmates make fun of him all the time. One day Hajime and his　classmates are transferred to another world, and each of them receives a special power to survive in the mysterious magic world. However, poor Hajime is assigned as a smithy, which is useless in their deadly adventure, and his classmates abandon him in the dangerous dungeon…
Hopeless Hajime finds no way out from the dungeon, and there he meets a Vampire girl, Yue. They decide to survive and escape from the dungeon together, and to be the most powerful of all in this mysterious world…