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 equipment 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 tells 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 gets an idea on how to escape the labyrinth.

Chapter Two: Escape
Using Bioplant Seed found in Naofumi's armor, they abuse the spatial 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 at a town where various native races live and Kizuna explain them one by one. Kizuna also explains her world's technology which is quite different from Naofumi's world.

Chapter Four: Selling Drop Items
Naofumi and Kizuna tried to use items from each other world and the results are different from its original functions. Because using an Earth Crystal yield so much experience for Naofumi, he decided to get it to effectively gain levels. To buy Earth Crystals, Naofumi planned to sell Soul Healing Water due to its unavailability in the current world.

Chapter Five: Sales Demonstration
The sale began with a demonstration of Soul Healing Water's effect on Soul People. Three of five bottles was sold and the rest was used up for sampling. Naofumi decided that the next day he will hold an auction to sell the items. After the sales, they went leveling and realized that an activation event has currently occurred in the area. The next day, many people gathered to participate in the auction. Naofumi set a situation to make the bids soared and gain significant profit.

Chapter Six: Otherworldly Equipment
Naofumi and Rishia bought equipment, armors, ores, ofuda and travel voucher. They also leveled up using earth crystals and battles along the way to the capital. At the capital, the dragon hourglass is located at the adventurer's guild. Due to an event involving a vassal wielder is currently held there, the guild is being crowded. Naofumi and co. decided to exploit that to reach the hourglass but some officials noticed Kizuna's presence and ordered the guards and the vassal wielder to capture her. Naofumi and Kizuna successfully stalled the vassal wielder and managed to reach the dragon hourglass to teleport to Kizuna's safe zone.

Chapter Seven: The Legend of the Waves
Arrived at Kizuna's home country, Naofumi, Kizuna, and Rishia welcomed by someone who seems to have authority. After introducing Naofumi, everyone looked at him suspiciously. Kizuna asked about the reason behind Glass' assault on Naofumi's world, and then the authoritative man told the truth about the waves according to an ancient text. Shocked by the revelation, Kizuna suggests research regarding the waves before believing the validity of the text. Kizuna also ordered the authority to look for Naofumi's missing party members.

Chapter Eight: On the Way to the Hunting Hero's House
Kizuna went home with Naofumi and Rishia to spend the night before starting the search for Raphtalia and Filo. Naofumi asked how Kizuna and Glass became friends. After the conversation, Kizuna went fishing at a beach and Naofumi followed her. While fishing, Kizuna explained how an accessory can enhance her holy weapon. Naofumi wanted to try Kizuna's method to check if his shield can be enhanced that way.

Chapter Nine: Shikigami
Naofumi, Rishia, and Kizuna met Ethnobalt who introduces himself as a boat vassal wielder and shapeshifting monster like Filo. Ethnobalt brings Kizuna's shikigami, Chris to help to find Glass. Kizuna asked Ethnobalt to grant Naofumi a shikigami to help to find Raphtalia. Using Raphtalia's hair as the medium, Ethnobalt made shikigami which Naofumi named as Raph-chan. Chris and Raph-chan pointed out that Glass and Raphtalia seem to be in the same location, which isn't a friendly territory.