When 17-year-old otaku Hajime Nagumo is whisked away to a fantasy realm alongside his classmates, he finds himself with a lackluster transmutation ability compared to their formidable powers. Betrayed and left for dead in a treacherous labyrinth, Hajime's fight for survival begins. Determined to escape and return home, he forges an unlikely alliance with a vampire named Yue and others, gradually evolving from a mere outcast to the most powerful force in the land.