At a critical moment, Naofumi and the others are saved by a young girl. Ost’s sacrifice is enough to save them from their battle to the death with Kyo, but Kyo's able to escape to another world. Naofumi attempts to follow him, but he awakens to find himself imprisoned in a mysterious, never-ending labyrinth! His friends are scattered, he's stripped of his power and back at level one. He must rely on his wits and newfound allies to escape. As he navigates treacherous paths and battles formidable foes, he uncovers a sinister plot that threatens not only his own survival but the fate of an entire world. Can Naofumi regain his strength and reunite with his friends before it's too late, or will he be forever trapped in this inescapable prison? Perfect for fans of isekai adventures, fantasy series, and summoned to another world stories, this volume promises a thrilling blend of action, mystery, and heart as Naofumi faces his greatest challenge yet.