"The bullied child" Nanyun Hajime was summoned to another world with his classmates. Although his classmates showed special abilities oriented towards combat one after another, Hajime only had the ordinary ability of an alchemist. Moreover, he was still the weakest in the other world, and was maliciously pushed into the abyss of the maze by a classmate──! ? In the abyss of despair where he could not find a way to escape, Hajime was destined to meet the vampire Yue, and found the way to become the strongest as an alchemist──. "I protect Yue, and Yue protects me. In this way, I will be the strongest. I will sweep away everything and surpass the world." The boy who fell into the abyss and the vampire who lived in seclusion in the deepest part, the "strongest" fantasy story of the other world created by the two of them, has now officially begun.