Encore Volume 4

I'm not sure of the name so here is a glossary:

Ren = fake hero
Erize = maou-chan
Krishe = tsundere dragon
Fear/Fia = pervert angel
Eriese = Saint girl of Canaan, possess the same power as Ren
Sword king = not cool guy, boss of the guild elemental dusk (something like this totally forgot LOL)
The 3 observators = crasy scientists just like me
Edios = human created spirit I guess

1 part :

Beginning of the novel is pyjama party, because of previous fight Ren's body is really in bad conditions so they are waiting for it to get better. We learn that Krishehates boredom, as ever Fear drinks with a slutty negligee and maou chan has a doggish pyjama because she loves dog, on a side note we learnt that they have familiar and Elise's one is Kerberos/Cerberos.
After this, Ren and saint girl goes on a date, she shows him the town and make him go to the most secret place of the saint town, a kind of chapel where is kept the secret of the first invocator, a girl who could control the 4 spirits at the same time, her name is ... Well no idea, saint girl get cut before saying it, but Ren supposedly knows it because of his team/guild.

2 part

Fake hero team + saint girl team goes to the warrior capital where badass dude reigns because of V3 events ( weird spirit that attacked them at the saint capital + anti angel weapon/armor they used to invade paradise), they do spying while shopping: tsundere dragon gets sweet, maou chan loves dolls but because it s a nice tool for curse, and Fear is playing the drunk girl to get Ren. Actually all of this was a play to see if there were buildings in the capital where research on spirits could happen but unfortunately none.
They decide to go into the castle but since it's too difficult to do it backdoor they decide to go in the frontdoor

Part 3

During the parade to welcome Saint girl, maou chan summons Kerberos shadow ( since shadow it can't hurt human being) and make it goes on rampagne to make all the human leave and tsundere dragon summons a manticore ( maybe ?) from the Earth, breakthrough in the castle.

Fear and Ren uses the commotion to infiltrate the castle as most guards are on maou/dragon but they get stopped by some soldiers inside. Ren falls into a room (he was actually invited inside) where he meets the 3 observators.

Here comes the shit part, concentrate :

The 3 observators are actually stone, they used to scientists in a town called sheiramilice a long time ago even before the 3 princesses where born, at this time the world was ruled by technology and research was focused on summoning processes, there were tons of people with the same power as Ren and half of them were concentrated in this laboratory town. The 3 scientists each have a major, one is research on angel, the second on dragon and the last one on demon.

But one day they get attacked by the shining one, something that came from nowhere and attacked the town. Why the weird name? Because they can't even describe it as an ant can not describe a human how much dimensional differences there are. But because it was shiny so shining one. The shining one destroyed everything, every invocators and town, research places, until none is left.
To get revenge on it, the 3 crazy move their consciousness into stones using technology and lived since that time, waiting for their revenge, they observe everything that happens in the world and know everything.
We learn that the second time the shining one appeared was 300 years ago during the war of the end. And they are also the one who created the Edios which attacked fake hero and saint girl in V3, actually it was an error of their part as they lost control on it, it should have fought the demon of wave then Shion to be completed but got attracted by the spirits of Ren/saint girls.

We also learn that now the Edios is completed unlike 300 years ago ( they made it fight againt Erin and the 3 princesses too) and want to give it to Ren because he is weak. Unlike badass hero king and Shion he is weak, no talent, so unlike them they tought he would accept because he seeks to be strong to protect his girls.

Ren refuses saying there's something fishy in their story, their story doesn't explain why his spirits ( gnome/salamander) are scared of the Edios ( which are being of light ... light, shining one hummm) so either they are hiding something or they are unaware of something.

The 3 crazy decide to punish him by sending 3 Edios to the 3 princesses and make them suffer.
They say they can't stop them anymore, only the crazy king can do so.

Part 4

Ren leaves and rush towards the 3 floors, get stopped by the Elemental dusk number 3 but Shion protects him, Ren rushes towards the boss.
Saint girl tries to join the brawl to help Ren/princesses but is stopped by Elemental number 3 + Edios he controls.
The 3 princesses each fight one Edios. Get totally destroyed at the beginning but manage to win. For exemple all physical attack of fear are returned, but actually she says that only 99% of the energy of her punch is returned so she just needs to hit be a hundred times stronger than the Edios to win the fight. maou chan has the same ennemy but with magic ( if you are wondering why they didn't switch their opponent, it's simply a matter of pride they each wanted to destroy the ennemy with punch/magic), as for dragon chan her opponent could regenerate as much as possible, she gets bored, turns into dragonm thoroughly destroy everything to make sure it doesn't regenerate.

Ren on his side thinking he would help them by rushing to the big boss, meets him, he tries to talk but the opponent has no envy of talking.
Ren gets totally trashed by the King, way too strong, stronger than any ennemy he met so far.
In the end, Ren gets a power of amity from Erize through the shadow of Kerberos, summon spirit sword Vierge and fight again the king.
Interesting part is the sword doesn't return to its original place even after the place, the king says that the sword deemed him as its [place to return] as he is the right wielder.
Eventually the king talk to the spirit saying that they are [protector created from the beginning of the world] and he tells them to say to Ren that they shall meet again when they will be in front of the Encore. The king leaves before the 3 girls come.

Epilogue

Ren wakes up, get the news from saint girl of what happened after, and says that it probably isnt the Edios that are the only cause of the spirit fear, right there were edios there s 300 hundred years ago during the war of the end but even right now after the research on edios is stopped the spirit are still scared. So there's a second reason.

Shion and his team returns to the paradise gate they used to come [instead of coming by boat they asked God if they could use the gate as a transport mean] and see it broken, they say there's something more deep that is crawling in the world as it's impossible for any normal human to find a gate protected by the spell of angels and destroy it in this few time.

Badass king walks alone in a desert saying he is awaiting the time he meets again Ren and sees Shion.

Fake hero team decides to go for the underworld to see the present maou and ask him the seal of demon to go to the island of the beginning.

La fin.