In Tatsumi Town, a string of enigmatic vanishings has taken place. Kiriya experiences a premonition from a stunning girl with pointed ears. A book about a parallel realm surfaces, and Mao enters our world in pursuit of her long-lost companion, Zero. Unforeseeably, she encounters Souma and Kureha, who she inadvertently transports to her dimension. Now, Souma and Kureha must embark on a quest to return home, but sinister forces lurk in the shadows, and they soon discover that the journey back is more challenging than anticipated.