Light Novel Volume 15/Summary

Chapter 1: Diary - First Part.
Rudeus reads the diary from his future self, which described the following events. Roxy became infected with Magic Stone disease, which was identified by Cliff and his Eye of Identification. This can only be healed with God rank detoxification. So, Cliff, Zanoba and Rudeus go to the Holy Kingdom of Milis using teleport magic circles to get the book with God Class Detoxification chants. Unfortunately, this book is within a cathedral that cannot be entered unless you are archbishop level. They decide to steal the book but are caught. Cliff dies during the battle and the magic teleporting circle that they used is destroyed. They also become wanted men in the Milis region. By the time Rudeus and Zanoba arrive home, Roxy was already half crystalized and had died. Elinalise is informed of Cliff's death, and leaves town while heavily pregnant. Rudeus then becomes depressed due to Roxy's death and dependent on alcohol. He begins neglecting Sylphy. Sylphy then leaves with Ariel who has returned to the Kingdom of Asura. Rudeus then decides to chase after Sylphy by following her to Asura. During his travels, he frequently runs into Eris. She is unable to properly express her feeling towards Rudeus and so just hits him. Rudeus discovers that Ariel has returned to Asura in order to gather an army to perform a coup d'etat. This fails however, and so Ariel, Sylphy, and Luke all die.

Chapter 2: Diary - Second Part.
Rudeus continues to read the diary from his future self, which described the following events. After Sylphy's death, Rudeus spent more time going to brothels. He also frequently ran into Eris, who also was living in Sharia. Rudeus continues to have mixed feelings about Eris. The Milis Church put a bounty on the heads of Rudeus and Zanoba due to their exploits from stealing the God Class detoxification chant book. Zanoba completes his automaton research. He is able to create essentially a robot that looks like Sylphy and acts like her as well. Rudeus ends up destroying this robot. Zanoba ultimately mass produces his robots. Rudeus develops a hatred for Hitogami. He vows to get stronger in order to kill Hitogami. Throughout this process, he loses touch with his family; only Aisha stays in touch. To augment his physical strength, he and Zanoba develop fully body armour similar to his prosthetic hand, which Rudeus can augment with magic to improve his physical strength.

Future Rudeus continues to work on his magic over the years, developing gravity magic, electricity magic, voice magic. However, he becomes a bad person; he would frequently get into arguments, do whatever he wanted, and occasionally raped women. Rudeus continued to run into Eris, and so he begins to falsely suspect that she is affiliated with Hitogami. Rudeus continues to try to gather more information about Hitogami by questioning beings who are long-lived. He ends up trying to speak to Atofe, but ends up fighting her and her imperial guard, including Moore. During the battle, he becomes careless and is saved by Eris, but then she is killed as a result. After Eris' death, Ghyslaine explains to Rudeus that Eris has loved him all this time and had followed him around for this reason. Ghylaine blames Rudeus for Eris' death.

Years pass, and Zanoba dies, killed by the Order of the Temple. Julie, Ginger, and Aisha are killed as well. With this, Rudeus no longer has any living loved ones. There was no mention in the diary of the fate of Lucy, Norn or Lilia. Through his travels, Rudeus discovers the nature of this world, which is that it shaped like a cube, with six sides: Dragon world, Human world, Demon world, Beast world, Ocean world, Sky world. The interior of the die is the Void World, where Hitogami resides. Rudeus learns that in order to travel to the Void World, one must collect the 5 ancient Dragon Race treasures. However, collecting all 5 treasures turns out to be impossible within his lifespan. Rudeus then learns how to travel to the past and he decides to go to the past to correct his mistakes. The diary then ends here.

Chapter 3: Resolve.
After finishing reading his future self's diary, Rudeus has a discussion with Sylphy and Roxy. He vaguely reveals that someone has shown him the future in which a bad person would cause terrible things to happen to his family. Rudeus then broaches the subject of adding Eris to their polygamous relationship. Sylphy and Roxy initially object, since they know that Eris broke Rudeus' heart, which resulted in his erectile dysfunction. Rudeus reassures them that he now knows that this was actually a misunderstanding. Both Sylphy and Roxy tentatively agree to accepting Eris, depending on how well Rudeus' and Eris' are able to reconcile in their meeting together.

Rudeus then falls asleep, and he sees Hitogami in the white void. Hitogami is initially extremely frustrated at the fact that future Rudeus has disrupted Hitogami's plans to kill Rudeus' family. Hitogami reports that Orsted is trying to kill Hitogami, but cannot do so alone. However, Rudeus and his descendants are not affected by Orsted's curse, which cause all beings to hate Orsted. This means that Rudeus' descendants may end up assisting Orsted and kill Hitogami. Furthermore, Rudeus and his descendants have 'strong fate', which means that Hitogami has difficulty with changing their fate. So, because Rudeus and his descendants have strong fate and may end up helping Orsted to kill Hitogami, Hitogami tries to kill Rudeus' descendants to prevent his own ultimate death. Rudeus tells Hitogami that he will do anything for him if he is able to save his family. Hitogami therefore suggests that if Rudeus wants to save his family, he needs to kill Orsted.

Rudeus then wakes up. He vows to kill Orsted to save his family from Hitogami.

Chapter 4: Nanahoshi's Hypothesis.
Rudeus consults with Nanahoshi, in accordance with his future self's instructions. He tells her everything about his future self's encounter, the diary, and his dream with Hitogami. After spending the day reviewing the diary and thinking, Nanahoshi discusses her hypotheses with Rudeus, which is as follows. Rudeus and Nanahoshi were transported into this world by someone whose goal is to kill Hitogami. Nanahoshi was transported so that she may create some currently unknown method to kill Hitogami, while Rudeus was transported so that his descendants and Orsted could Hitogami with that method.

Nanahoshi then suggests to Rudeus that he team up with Orsted instead. Rudeus refuses, since Hitogami is unreachable, while Orsted is within this world. He reasons that for the purpose of protecting his family from Hitogami, it would be easier to kill Orsted as commanded by Hitogami, than to kill Hitogami himself. Rudeus then begs Nanahoshi to help him kill Orsted. She is reluctant, as Orsted has saved her in the past, but ultimately agrees to help.

Chapter 5: Letter Arrives.
Eris gets ready to leave the Holy Land of the Sword to meet up with Rudeus in Ranoa, who she hasn't been in contact for many years. Just prior to departing, she receives a letter from Rudeus. The letter describes how Rudeus initially thought Eris had rejected him, but he now knows this was a misunderstanding and that she actually loves him. Rudeus informs Eris in this letter that he currently has two wives, but is willing to accept Eris has his third wife. Eris' two friends argue over whether Rudeus is an asshole or not. Rudeus' letter also included a post script, which stated that he planned to challenge Orsted to battle, with the caveat that he may not survive. Eris becomes excited at this, and she and Ghyslaine head off toward Rudeus.

Chapter 6: Preparation.
Rudeus works on his preparations to kills Orsted. He works on creating full body magic armour that his future self also used, with the help of Zanoba and Cliff. He decides that he needs to find a suitable partner to fight Orsted; Badigadi was missing, Ruijerd wasn't present, and Perugius refused. He rules out Zanoba, Cliff and Elinalise since they are his friends. He considers begging Eris to help fight, if she were to arrive in time. He puts the subject of finding a partner on hold for now. Rudeus also considers various battle tactics to take down Orsted, including using traps and sneak attacks.

During these preparations, Hitogami then reappears to Rudeus in his dreams. Hitogami is quite pleased with Rudeus' decision to try to kill Orsted, but warns that he will wipe out Rudeus' family if he fails. Hitogami offers advice on building the magic armour and suggests that Rudeus use magic tools in his fight. Hitogami again confirms that he cannot see Orsted's future but can see his own, and so he sees that in the future he is killed by Orsted and Rudeus' descendants. Rudeus gets Hitogami to promise that if he kills Orsted, that Hitogami will leave Rudeus and his family alone.

A month passes, and the magic armour construction is making good progress. It stands 3 meters tall, which is much larger than the armour that future Rudeus created for himself. By making the armour bigger, the engineering was easier and it was more robust. Rudeus also goes shopping with Roxy to buy magic tools. He comes up with an idea to multiple of the same tool together so that he can fire off his stone cannons in rapid succession like a gatling gun. They enlist the help of a craftsman to help make this tool. Rudeus then consults with Nanahoshi. They come up with the idea of using poison. They also come up with a plan to lure Orsted. Using Ariel's connections, Rudeus buys the poison that he plans to use against Orsted. Rudeus chooses his planned battleground against Orsted and practices using traps. He also learns close quarters combat from Elinalise.

Chapter 7: Preparation Complete.
Another month passes, and the magic armour is complete. It is 3 meters tall, and he wears it like a mecha suit. It has a gatling cannon installed on one hand that fires stone cannons. The other hand has a magic absorbing stone. The armour is also equipped with a shield with Paul's Tantou sword attached, which can ignore armour. Elinalise reveals that she is pregnant with Cliff's child. Cliff confirms this for himself with his Identification eye. Rudeus tests out the magic armour by sparring with Sylphy and Zanoba. Sylphy's magic and Zanoba's punches are ineffective against the armour. Rudeus is quite pleased with the armour.

Back at home, Roxy announces to the family that she is pregnant. The whole family congratulates her. Rudeus notes that this was a stark contrast to the atmosphere when Lilia revealed her pregnancy due to Paul's infidelity, many years ago. Aisha reveals she has successfully cultivated rice in their garden. Rudeus is excited at the idea of being able to eat rice regularly again

Chapter 8: Quagmire vs Dragon God.
Information to be added later on.

Chapter 9: Mad Dog King vs Dragon God.
Information to be added later on.

Chapter 10: Eris Greyrat - First Part.
Information to be added later on.

Chapter 11: Eris Greyrat - Second Part.
Information to be added later on.

Chapter 12: Summon.
Information to be added later on.

Chapter 13: Explanation.
Information to be added later on.

Extra chapter: Mad swords fit in the sheath.
Eris is awakening in one of the Rudeus Room and remember how she become his third wife. She dreamed of fighting Orsted all those years, with different outcome every time, nut never expect that Rudeus joining to Orsted. Fighting Orsted was only of the two objective of her life, now she want to spend her life with Rudeus.

Looking herself in the bathroom she compare herself with Sylphi and Roxy because this, she have low confidence in her skills, she leaves the bathroom and find Aisha, Lilia and Sylphiette preparing the and she try to help but because her high sword skill, she cut the pumpkin and the cutting table.

After finding that housework isn't her forte she decides to work and obtain money. She go with Roxy to find a job in the university. Roxy thinks that a gatekeeper for the university may be a good profession for her because is simple and leave her in the gate as a test. When she find a suspicious man want to enter, she tries to stop him, he tries to show his proof that he works here but because a suddenly wind, he tries to move his hand to his head, Eris prevent that and his hair blow away, that man was the principal Georg, with a gaze mixed of anger and shame, Eris was fired.

Eris is coming back to the house and was depressed because she cant do house works or working, when she arrives, find Norn discussing with a student that was aristocrat that wants her to be his fiance, and have a connection with Rudeus and Ariel. because he was bothering her, Eris arrives and cut his belt, threatening that she is going to cut him the next time and he ran away.

Roxy and Sylphi arrive and thank Eris, after talking about the events of that day,Sylphi says that she don't need to worry. because there are things that she can only do like protect Rudy back and Eris understood that everyone have talent and flaws and that she isn't useless.

When she was leaving he meets the gaze of Zenith she says thanks to her, In her mind she felt that Zenith answered saying "say that to Rudeus".Eris feels now more happy as wife.