Light Novel Volume 6/Synopsis

Prologue - Cal Mira Superstitions
In the aftermath of the wave at Cal Mira Archipelago, Naofumi decides that he needs another party member. Walking around the marketplace, he noticed a crook merchant selling accessories at incredibly high. Naofumi uses his connection with Hickwaal to intimidate the crooked merchant and teaches 'proper' business practices. The Queen then arrives and leads Naofumi to the second four-heroes conference.

Chapter One - The Seven Star Heroes
With the last battle against the Heroes of Glass' World, it was clear that the three attack heroes - Ren, Itsuki, and Motoyasu, were not strong enough. Naofumi tried to tell them that all of the different power-up methods they used actually worked together. The other heroes refused to believe him and continued to call his Wrath Series Shield a cheat. Focusing on the attackers from another world, Queen Melromarc suggests that it might work similarly to the Seven Star weapons on their world. These Seven Star Wielders are either adventurers of this world or people that are summoned that eventually earn the right to wield the weapons to assist the Four Legendary Heroes. The Queen decides that the 4 heroes need formal training.

In a private discussion with Naofumi, the Queen expresses worry about the other 3 heroes and mentions that the Seven Star Heroes are stronger than them currently.

Chapter Two - An Unhappy Girl
On the way back to his room, Naofumi meets Rishia - overloaded with errand items for Itsuki. Naofumi helps her and on the way back Rishia explains how Itsuki had saved her. Now she feels like she needs to repay a debt to him. However, Itsuki has not been treating her well and is not even using her strengths.

Back in his room, he explains the result of the conference to Raphtalia and Filo. Fitoria listens to the conversation through Filo and mentions that she has fought other people coming out of the rift of the waves before. She also promises to continue to help with the waves.

Chapter Three - Framed Again
Naofumi walks by the ocean when he sees Motoyasu trying to calm the crying Rishia. When Motoyasu sees Naofumi, he shoves Rishia to him and moves away. Rishia is crying but explains that the Spear Hero was trying to cheer her up. She then apologizes to Naofumi and runs off.

The next morning, Naofumi asks Motoyasu why Rishia was crying. When Naofumi learned, he crashed in Itsuki's room for an explanation. Apparently, Itsuki was jealous of the praise she had gotten from the Queen. One of his party members broke the accessory and then framed Rishia. When Rishia arrived to his room, Itsuki immediately kicked her from his party. When Naofumi found proof that she had been framed, Itsuki then said that they won't let her back in for her own safety. After a confrontation with Itsuki, she ran away.

Naofumi chased after her and found her being pulled out of the water by Filo. She had just tried to drown herself with the rejection from Itsuki. Naofumi offers her a chance to grow strong for Itsuki which she hesitantly accepts. Naofumi assigns her to a magic support role in the party.

Chapter Four - Custom Order
Naofumi and his party travel to the Melromarc castle. When there, he powers up his shield using materials from the castle's stockpile. He then heads to the Old Man's Shop and orders upgrades for everyone's equipment. Finally, they meet with "Nice Guy" Van Reichnott and Keel. Naofumi agrees to take care of Keel but not put her in too much danger for Raphtalia's sake. He then asks Keel and Rishia to become his slaves.

Chapter Five - Battle Advisors
Rishia and Keel immediately reject to becoming slaves. However, after hearing that it can help them power-up and that he is a nice master, they calm down and eventually accept. They get the slave crest with the only condition being that they cannot lie to Naofumi. Filo then takes Keel to level up.

The Queen introduces one of the combat advisors - Eclair Seaetto. She had been spending her time imprisoning the slavers from the Melromarc army and is the best swordswoman that is trustworthy. During training, she impressed Naofumi in her technique and skill. On the other hand, Rishia impressed Naofumi in how useless in battle she was. Filo and Keel returned making good progress with Keel's levels. The other heroes did not participate in the first day of training.

Chapter Six - Hengen Muso Style
The next day of training, Naofumi met with the Queen to meet a new combat advisor - the master of the mysterious Hengen Muso Style. They found the combat advisor excitedly praising Rishia as a prodigy. It turns out that the combat advisor was an Old Woman that Naofumi treated as the Saint of the Heavenly Fowl. During sparring, she showed Naofumi the ability to use defense-rating attacks (attacks that increase damage with the target's defense) and explained the ability to reflect the attacks. She then gave a brief overview of the Hengen Muso Style.

Chapter Seven - Impossible Training?
The other heroes refuse to learn the Hengen Muso style. Ren gets introduced to Eclair who then challenges him to a spar which he proudly accepts. The spar is to be sword skills only - no skills or magic. They start the fight and it becomes clear that Ren has no formal training or technique. Despite the level gap, Eclair gains the upper hand. After the few moments it took for him to get cornered, Ren used a Legendary Sword skill to end the fight and declare himself the winner. Naofumi, Motoyasu, and Itsuki chastised him for cheating.

The other heroes slowly agree to take some Hengen Muso lessons. They meditated in the mountains and spared with the Old Lady who easily beat them. During the lessons, Naofumi starts trying to figure out what "life energy" is.

Chapter Eight - Life-Force Water
That night, Naofumi went to the Apothecary looking for a potion that can affect "life energy." The shop owner finds an old, hardly used recipe that might work. However, it uses some expensive items to create. Naofumi then buys the life-force water and recipe and heads to the Old Lady to try it out. Rishia tries the new Life-force water and is suddenly filled with energy. Rushed to try it out in a spar, Naofumi casts「Aura」on her which further stirs up energy. During the spar, Rishia gained a significant stat boost but could not control her power. They try the potion and spell on Raphtalia but it hardly has any effect.

Chapter Nine - What it Means to Train
The other heroes start to skip out on Hengen Muso training. They tried to leave the country but were stopped by Naofumi and the Queen. The Queen then gives them a compromise - they will defeat a mysterious monster which is causing many deaths and she will let them go. The other heroes reluctantly agree. Putting the training on hold, Naofumi is assigned to investigate Lerno Village. Eclair and the Old Lady decide to accompany them. Both Keel and Rishia had made good progress in powering-up.

Before they head out, Naofumi is confronted by a mysterious woman. She asks Naofumi to destroy her. Before he could respond, she was gone.

Chapter Ten - Kigurumi
Before going to Lerno Village, Naofumi stops by the Old Man's shop. All of his custom order had been complete to impressive standards. Though, to Naofumi's horror, the Pekkul Kigurumi had been transformed into a Filo Kigurumi which Rishia loved. Finally, they head to Lerno Village.

Chapter Eleven - ——'s Familiar
Just before reaching Lerno Village, Naofumi and Filo came across 3 adventurers who somewhat resembled L'Arc, Glass, and Therese but was interrupted by a villager before they could investigate. The village has recovered since being taken over by the BioPlant and put the modified plant to good use. However, the village has lately been attacked by Demon Bats and other familiars.

When Naofumi arrived at the village, it was being attacked by a swarm of familiars. Naofumi and his party defeated the swarm. Learning the direction that the monsters came from, Naofumi teleports to the Melromarc castle to update the Queen.

Chapter Twelve - Getting Ahead of the Enemy
Naofumi updated the Queen and learned that other monsters familiars with shells on their backs have been attacking all over the world. The other heroes did not provide any more information but were clearly hiding something. After the debriefing, Naofumi teleports back to Lerno Village to find Keel in pain. Upon inspection, Naofumi found a piece of tortoiseshell buried under his skin. Naofumi deduced that the monsters weaken or kill their targets with the shell fragments and then use the bodies to create more familiars. All the bodies of the defeated monsters were immediately burned. While fighting monsters, Rishia recognizes one of them from a book she read before. In the next debriefing, the other heroes did not show up.

Chapter Thirteen - Game Knowledge Bares its Fangs
The other heroes had left their assigned countries and abandoned Melromarc. However, the Queen's shadows had revealed that they are going to a country in the far east. Naofumi tried to ask Fitoria for help teleporting to that country but was denied. Rishia had finished he research into the monsters and told Naofumi that they were the familiars of the Spirit Tortoise, one of the four Benevolent Animals. The Spirit Tortoise should have been sealed but it looks like the seal may have been broken.

Naofumi and his party hurriedly rush over to the eastern country. Along the way, the countdown to the waves stopped. In its place was a new counter that showed "7."

Chapter Fourteen - What it Means to Be a Hero
Soon after the countdown to the waves had changed, Naofumi was informed that the Spirit Tortoise has awoken and is moving towards heavily populated areas. After it awoke, the other heroes they tried to pursue the monster but went missing.

Two days later, Naofumi had arrived at the Spirit Tortoise which had already destroyed many cities, forts, and castles. Thankfully, The Church of the Four Heroes was able to confirm that the other three heroes haven't died yet. Melromarc had allied itself with the nearby countries in order to stop this monster. They make plans to lure the Spirit Tortoise to an area where they can easily attack, enter the massive beast through its shell, and seal away its power. Naofumi and his party, including Eclair and the Old Lady, prepare to attack.

Chapter Fifteen - The Spirit Tortoise
Naofumi and his party start their assault by fighting the Demon Bats and other Spirit Tortoise familiars. When the familiars were thinned out, they attacked the Spirit Tortoise directly. They were hardly able to damage the beast when it used gravity magic and a powerful particle beam attack which nearly killed Naofumi. Through teamwork, Raphtalia and Filo were able to behead the beast. Naofumi and the defending army celebrated the victory.

Chapter Sixteen - The Country Above the Spirit Tortoise
Naofumi and his party were being cheered on by all sides due to defeating the Spirit Tortoise. However, the blue hourglass that arrived with the Spirit Tortoise still remained which means that the fight isn't over yet.

The next day, Naofumi, his party, and some of the defending army climb up the Spirit Tortoise's back to survey the area. On the back of the tortoise, they find a dead town and a mural written in Japanese by a previous hero. Unfortunately, the mural was so worn, Naofumi couldn't make sense of it. While they are discussing the potential meaning of the mural concerning the Spirit Tortoise, the coalition army was looting the area, much to Eclair's dismay. They then finish up investigating the area.

Epilogue - A Disquieting Place
Naofumi and his party head to the town where the other heroes were last seen. Naofumi couldn't find them but heard a mysterious warning that the danger isn't over. Naofumi, Raphtalia, and Filo then relax and eat.

Extra Chapter: Trials and Tribulations of the Bow Hero
Itsuki recounts how he was summoned to Melromarc as the Bow Hero. He was excited that was able to play in the world of the game Dimension Wave. He recounts hearing of a town with nobility demanding high taxes and going to check it out. He found the nobles governing the area, living in relative poverty, and being forced to marry off their daughter in order to save their people. These nobles were Rishia's parents.

Through investigation, Itsuki found that the neighboring nobleman who was about to get Rishia is crooked and draining his people dry. They then invaded the Nobleman's property, beat up the nobleman, and released Rishia to her parents. Rishia then asked to join Itsuki's party and was accepted.