Light Novel Volume 8/Synopsis

Prologue: The Never-Ending Labyrinth
Naofumi woke up to find that he got separated from his party, save for Rishia. In this unknown world, they turned back to level 1 and their equipments from their original world are rendered useless. They went to do some level-up but ended up being cornered by monsters and being saved by a hero. After introducing themselves to each other, the hero, Kizuna Kazayama confirmed that she is a hero from Glass' world but currently trapped in this labyrinth world. After remembering what happened after he jumped into the portal, Naofumi realized that he arrived in this labyrinth world and got separated from Raphtalia and Filo because they were trapped by Kyo when crossing to Glass' world.

Chapter One: The Hunting Hero
Kizuna tell Naofumi and Rishia about her background and the event that brought her to the labyrinth world. After some leveling and get some meal, Kizuna bring Naofumi to a mysterious archway which is inaccessible for heroes. They discussed about the possible options to escape, and when Naofumi find something in his armor, he get an idea on how to escape the labyrinth.

Chapter Two: Escape
Using Bioplant Seed found in Naofumi's armor, they abuse the spacial anomaly which summoned a dimensional hole to escape the labyrinth world. After a struggle to land safely, Kizuna confirmed that they are in her previous world.

Chapter Three: The Unknown World
Naofumi and Kizuna decided to stick together and get out of the country they are currently at. They arrived to a town where various native races live and Kizuna explain them one by one. Kizuna also explain her world's technology which is quite different from Naofumi's world.