Once again, Laspada Fortress, the site of the planned reconstruction.

　There, the old masters Granbaza and Alanziel have teamed up to lead the rebuilding of the fortress.

　They have fought fierce battles with each other in the past, so the fact that these two men are united in their dreams is quite unusual.
　That's why there were many people who wanted to participate in the rebuilding process, and the site was always crowded with people.

　There was no shortage of people, and therefore there would be no delay in the work.
　Five years have already passed since the reconstruction began. Originally, it should have been completed a long time ago.

　There were political factors that delayed it to this point, but there were other reasons as well.
　In fact, this one is more serious........

◆

'No, wait, we'll keep this wall open. We'll make sure there's an opening. And a hidden room.

　On a construction site, a boy was making a lot of noise.
　His entire body was white, and from the looks of it, you could tell that he was unworldly.

'What? "If we build a cavity in here, the entire fortress will be weakened"?　What are you going to do if you're scared of that?　The impossible is the only way to have fun!
"That Ida-sama..., Ida-sama...!

　You will be able to get a good deal more than just a few hours of sleep if you are able to get the right amount of sleep.

　That's why the people around them are even more confused.
　I'm sure you'll be able to find out more about this.

You can't do that. They are doing their best to make sure that the construction period is tight. It's not fair to ask them to do something even more difficult.
What do you mean?　Don't you know that now is the time to give your all and more!

　A child who is not afraid of Grand Barza, who is supposed to be the greatest in the field.

You know what?　Buildings are meant to last for hundreds of years to come!　And that's after the creator's death!　That's why it's a once-in-a-generation job that can't be skipped!
You yourself will still be around hundreds of years after you die...?
Even more so when it's a huge structure that will be seen by thousands of people for a long time to come!　What's the point of cutting corners and making them?　This is the kind of thing that you should put everything you've cultivated into to make it the best it can be!
So, what kind of gimmick are you trying to put on the fortress this time?
''Wouldn't it be cool if this place opened up and the cannon extended out!

　Grumberza is normally the chief executive of the scene (the demon race side).

　Why is that child so high and mighty to such a heavyweight?

　Everyone thinks so.
　The reason I think so is because I don't know the child's true identity.

　Who would have thought so?
　That white child was the Ida of the Heaven and Earth, the hero of the Four Heavenly Kings in the Demon King's Army hundreds of years ago.

　Even if he was the Fourth Heavenly King, he was still a person, and he would never be able to remain at the top of the heap forever due to his irresistible decrepitude.
　However, because the Demon King and the Demon King's Army would continue from generation to generation, the Four Heavenly Kings had been replaced many times before.

　Both Granbaza and Ida were the same in that they had already fulfilled the duties of the Four Heavenly Kings and retired from active service.
　The only difference was that Grambarza hadn't even been retired for ten years, while Ida's era of activity was already several hundred years in the past.

''Who is that kid really...?

　The people around them, who have no way of knowing such a secret, are baffled.

　And Grampaza, too, is struggling to cope with his senior by far.

"I never thought I'd be bullied by my juniors at my age...?
''It's hard to deal with a senior colleague of yours, isn't it?

　The new person who appeared there was the great brave Arantzill, who was also the chief executive of the Rasperda Fortress rebuilding (on the human side).
　Just a few days ago, he headed to the Center Guild and immediately returned to the Dragonfly.

''Shall I give you a thumping from my end?　Fundamentally, the heroes and the Four Heavenly Kings are enemies. Hence, even if you're a great senior, there's no holding back!
Please...

　It was Granbaza, who was being hunted down to the point of asking his nemesis for help.

　Arantzill approached Ida with a formal request.

'Hey kid. Go home. Or come of age.'
That's a wild thing to say to a child. Don't you think your grandchildren will hate you for that?
''I'll kill you, you ah!

　Ida's sarcasm hit a critical point in Arantzill's psychological kryptonite.

''Stop, Alanziel!　Don't be a provocateur!　You'll never win against this man who lives for hundreds of years in a verbal quarrel!

　Granberza only increased his futile hardships as he pushed his former nemesis to the ground with a feather-light squeeze.

''Well why are you still in this world in the first place?　Your presence here is long overdue, isn't it?

　The fact that Ida, a man of hundreds of years ago, exists today is a mystery in itself.
　The reason for this was that this was also the ultimate being beyond human knowledge.

　The Demon King, who is equal to the God who rules this world, created and holds various worlds as a plan to fulfill his wishes.

　One of these worlds, Valhalla, presides over the Shura Road and welcomes the souls of warriors who have once distinguished themselves in the past.
　These warriors will fight endlessly in Valhalla and continue to refine their already strongest abilities.

　They will use their strength to fulfill the Demon King's wishes.
　However, not a single soul of the Shura has ever reached that point.

　Ida, who was once the strongest of the Four Heavenly Kings, "Heaven and Earth", was one of the Shuras scooped up into the heavens in this way.

　He has further refined his own power in the other world which is equivalent to the afterlife.

　Just a few years ago, he returned to this world for some reason, and on that occasion, he was seen in front of Dariel and Granbaza.
　His business in this world is long gone, and he should have been allowed to return to the astral world a long time ago, but....

"You're still here, aren't you...?
"I don't want to be an eyesore...?

　Granvaza and Alanziel are the oldest of their generation, and are now respected by all those younger than them.
　It's a good idea to have a good idea of what you're looking for.

'You really should go home already, dude.

　You say, as if to a friend who keeps sitting around.

"No, wait, listen. Listen. I was going to go home as soon as my mission was complete. But then, something happened in this world that I couldn't let go of. You can't just leave it at that, can you?
What's the one thing that can't be left alone?
That's it.

　He points to a huge structure that is still not completed and is only half built up.

'Rebuilding the Rasperda Fortress!　Can you go back to Valhalla quietly when you hear that such a major undertaking is taking place!
Why?　Can we go home?

　Being a father of Dariel's blood, he knew how to tweak it as well.

'You don't understand, my dear Granbaza, explain it to him.
Your involvement in the renovation of the old Rasperda fortress?

　Rebuilding.....There used to be a fine fortress here.
　It was in need of rebuilding because it had been destroyed.
　It was the fortress before its collapse that Ida was involved in before she was alive.

'Yes, it was the human side that built the fortress in the first place. That was taken away by me and the Drismegians in a joint operation.
That guy.
It's nice to take it, but it's a fortress the enemy used to use, so it can't be used as is.　That's where we made a major renovation so that the demons could use it properly. With magic.

　That's why the Lasperda Fortress of the past had become an impregnable danger with a variety of magical traps.

In fact, that's why the fortress is so solid. It's so solid, in fact, that the human side has never once dropped me.
'Oh?　I dropped that fortress when I was on active duty.　Don't put the right fucacies in there?
'Like a burglar in my absence!　That's when we had a general who could properly run a fortified facility!

　The rivals have been sparking for a long time.

　In short, it was only because of Ida's skill that such a solid fortress was completed.
　The former Lasperda Fortress was a masterpiece in which the Ida of the Four Heavenly Kings, the Heaven and Earth, had concentrated his wisdom and technology.

As the producer, I'm delighted to learn that such a fortress has been in operation for several hundred years. As a producer, I'm delighted that such a fortress has been in operation for hundreds of years. But it's gone now, and new ones are being made. You'll want to wield your arms!
''Oh........?''

　The two old men together, the emotion on their faces was 'troublesome'.

''This is an opportunity to incorporate all the trapping mechanisms in my brain to create a stronger fortress than the previous one!　And I've got an idea that I really wanted to attach to the front fortress, too!　And now we're going to put it to work!
Why didn't you use that in the last one?
I was stopped by my colleague, Doris Meghian.

I heard that he was scolded, "If you do what you want, the renovation will never be finished," and the construction was forcibly terminated.

"He was a scumbag at heart, but he had a rational way of thinking...
'That's why we're going to build the most powerful fortress ever!　It's going to cost about this much to build, so go get it for me!
It's impossible. The Demon King's Army is in financial trouble.

　I imagine that he must have annoyed Drismegian by doing this in his lifetime as well, and he said, ''This time I have to be the one to stop him! It was Grumberza who was determined to do so.

'Don't worry, Grumberza. I'll help you stop it, okay?
I'm sorry, Arantziel. But when the time comes, I'll talk to the devil king directly.

　It was the ultimate technique, 'I'll tell a greater person what to do'.
　But after overhearing their conversation........

''It's a pity. That person has already agreed that I still remain in this world.
"Why? !

　The best of the best from the past scream.

That man seems to be starting a new game. And he's planning to make me work for it. I'm in my free time until things really get underway.
''...........?''

　Granbaza and Aranziel originally looked young for their age, but they had aged a lot in an instant.

　The hardships of the two of them are not over yet.