"Gre... what are you doing?

Returning home, Lentomia stands up and has a pulling grin as she opens the living room dining door.

"Welcome back, Mr. Lentomia. Take a look around, Sage Grecas is making a great challenge!

The fairy Metius greets her as she dances in the air with Patapata and rides on Lentomia's shoulder. And point to me in the living room dining room.

The outfit wears a wizard's white robe, a tailored blue shirt like that worn by a noble young man, and trousers featuring a skinny silhouette.

"Welcome home, Lentomia, as much as work."

"Oh, yeah. With the artifact analysis of the Holy Sword Battleship, I became obsessed."

Apparently, his partner, the half-elf wizard, who laughs at him, has been traveling to the underground facility of the Royal Castle in the morning to analyze relics of the Holy Sword Battleship (...).

"Is the artifact analysis of the Holy Sword Battleship progressing?

"Mm-hmm. That's pretty good. I'm moving on. What about the composition of the new material found, the joint structure of the regiosculls or the driving principle? Look at the report later, Greg's free to go in and out."

"Oh, I will."

The last few days have been a doozy with Isravian-related and Chuuta's curse, but I'm finally going to be able to get back to my original duties, too.

The room illuminated by a perfumed oil lamp is wrapped in a slightly pale light, but no one but me. The time is past ten o'clock at night, so I'm resting in each of my own rooms.

"So, Metius, a nice challenge is about Grey's weird (...) move?

"Don't be weird, I'm still working hard on this."

"I thought I finally saw the lights on your mansion through the dark park, and there was a black creepy shadow in the window... twinkle!... Was that grey?

"Well, I'm scared......!

"Don't say it like a fear experience! It's a clean dance practice."

"Greg is the dance!?

Lentomia pins her elf ears and laughs cahaha.

"When I went out with the Plum and Hempero dances, I felt a little sorry for them. I've been thinking a little bit about creative dance magic, too."

"I thought it was a new summons..."

"Dude, it's my urban, sophisticated dance, look closely"

I stretched my arms like a swan as I stretched my spine and gently kicked the turn to look. Shaft your right foot and ni rotate at high speed. Then stop the momentum cuddly with your left foot and then point to heaven with your bishy right hand.

"- Ha!"

A crisp smile will come naturally because you're sweating refreshingly.

My outfit is in thin, black trousers and a white t-shirt. It's like sleeping clothes, but this is easier to move.

"Ugh, yeah!?

"What do you say?

"How... why did you circle now...?

"That's what dance is all about."

"The wise Grecas tasted defeat and humiliation, so they took it seriously."

"That's an exaggeration..."

I smile unintentionally, but after everyone in the hall had fallen asleep, I was practicing alone in silence.

Riola, Plum, and Hemperoza's joint dance practice made me look painful. It was me who showed up unusual in creative dance practice for the cultural festival in the school building, but by tomorrow night, I'll be empowered to reveal the dance... and clear the snowflake.

No, I sophisticated physical control by magic to be precise, so that I could dance.

- Magnetic reinforced exterior (Maginotics) and operating aid with physical control technique (Controller).

The tactical information display (tactics) in front of me shows one magical excitement and information after another.

"Are you even using magic to practice dance!?

Lentomia with a twisted face. But if this happens, we can't leave later.

"Oh, yes, you are. The identity of the movement of rotation inspires' mucus magic (Sloudou) 'on the back of the foot to create a space with almost zero friction resistance. And when it comes to body rotation, it's achieved through physical control formulas (controllers) and so on!

"I haven't seen a magical waste in a long time..."

"No, I use it in the form of dance now, but this can also be used in combat. Here's the thing... you can spin your kurli brilliantly and avoid enemy attacks."

Make that kind of excuse for Lentomia's scratch.

"... ma, fine. I'm tired, so I'm gonna take a bath and rest."

"Oh, oh."

"Oh yes... in the royal castle, he said something about the world tree. Looks like we got a little movement."

Huh, yawning, Lentomia took off her robe and threw it in her chair.

"Ho? Looking forward to that."

"It's been a long time since I've been to the World Tree."

"Right!

There is still work to be done on the world tree, and the development of means of mobility must be pursued.

According to the report, there does not appear to be any external forces coming out "a little" here for a while, and the state of calm continues. What the hell was the move?

Is it the Duke of Automateria Norard or the secret society Zordaxzaian?

Don't be alarmed because it's about the dragons and the people who can freely turn themselves into regiosculls. Every preparation must be made and measures must be worked out.

But the next time you're relative, you'll settle for it.

But what's different is that I'm not fighting alone. In response to the threat, the Kingdom of Metanostadt has proven that the King's Government, the army and the Magic Society will stand united in the resurrection of Demon King's Castle.

So my immediate task is to develop the next generation of mobility means (...) that I had left behind as homework.

For example, I can reproduce the wizard's individual skills in a simple magic technique, like my flying barrel, so that even elementary wizards can handle it. On top of that, the aim is to eventually spread it to the private sector in a way that even non-wizards can operate.

In other words, what we need now is an independent source of magical energy, not relying on the wizard's skill or magical powers. It's a magic engine that can be driven by it.

As far as energy sources are concerned, the promising one so far is the solid 'magic accumulation mechanism (capacitor)', which combines crystal crystals and luminous stone powder.

I can build up magic and put this down, but if I use it continuously for an hour, I run out.

If a wizard uses it with magic, he will hold it about three to five times, but he still needs a wizard.

This would be one of the biggest troubles.

With regard to the drive system, a combination of Lentomian wisdom, various tips found in the world tree, and knowledge of magic engineering examined with search magic (Ggol) is managing to come up with an indication.

- Slime piston engine.

It's a magically powered engine that turns the wheels by turning the contraction of the artificial slime into rotational force. This achieves a revolutionary mechanism of transforming existing carriages into means of high-speed and long-distance travel.

Trial and error would be necessary, but it would be more realistic to modify an existing carriage than to fly through the sky or create a hovercraft.

"Nevertheless, we have to leave it to the magic workshop (Marsenal) to actually create a working magic institution."

"Sage Grecas, if you had Iola, could you have made it with a Sunday carpenter?

The fairy Imetius rests his feathers on the lab desk.

"It's hard to scrape metal from boulders, process metal, and complicate magic mechanisms."

"So you're subcontracting to a trusted magic workshop."

"Right, King's Government... No, I think I'll have the Magic Society introduce me"

And, the crystal sphere I was installing in my study glows, announcing the incoming magic communication.

'Um... sorry for the night. Is Master Sage Grecas at home?

"Oh, this has been a long time, Mr. Lincoln"

It's a pleasure to meet you.

That was a direct call from Ms. Lincoln Maysa, Director of Planning and Sales at the World Tree Development Corporation and Yugdocampania.

Although it is an organization directly under the Ministry of the Interior, the development of a transportation network to the world tree, the commemoration of the victory over Superdragon Drasilia and the joint holding of the World Tree Birth Festival are the hallmarks of the organization's work.

"What can I do for you?

"Dear Sage Grecas, I have information about the World Tree... Reports from local garrisons were passed on via the Royal Army and the Ministry of the Interior '

"What the hell is that, man?

"On the world tree, the flowers blossomed. Some of them are fruit-like. '

Ms Lincoln told her with the expression that she could not hide her joy.

"Hey, what no!?

Continued