Aruto Kirihara, an average high school student, is captivated by the Alice tales penned by the mysterious recluse, Alternite L. Tachyon, in a parallel realm. One fateful night, while crafting his own rendition of a potential 'third book,' he is astounded to witness a girl resembling his imagined 'Alice' soaring under the moonlight. Driven by curiosity, Aruto pursues the ethereal figure and stumbles upon a library where he observes her engaged in a fierce duel with another enigmatic girl. Thus commences his unexpected plunge into the realm of Alices, a select group of super-powered teenage girls who engage in battles within an otherworldly Wonderland to seize each other's 'hidden stories.' As these narratives are amassed, they will amalgamate into the mythical third tome, 'Eternal Alice,' promising to fulfill the possessor's deepest desire. While Aruto lacks the ability to transform into a magical girl, the coveted wish might fall into the hands of his devoted younger sister, Kiraha, or the enigmatic Arisu, the girl who has captured his heart.