The Reincarnate Became a Professor at the Academy

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The Boundary.

People often referred to it as such.

The frontline of humanity.

In the earliest, most chaotic days of the world.

And just as the world began to stabilize, they appeared.

The demonic race.

The clan of demons, of the Demon King.

They descended upon Earth intending to wreak havoc.

As dimensions were merging and humanity was reconciling, they were a fatal dagger.

The chaos they stirred was enough to swallow several nations whole.

「If they are the problem, why not summon them all to one place and fight them?」

A suggestion made by a transcendent being.

Many transcendents and gods allied with Earth agreed with this proposal.

Though some were not desperate, most were.

For it was not strange to think Earth could be destroyed because of them.

Therefore, they created a space called the 'Forgotten Space' as a boundary.

All demons and demon kings.

If they tried to descend upon Earth, they had no choice but to be transported there, no matter the reason.

That was the boundary.

The place where transcendents and gods resided.

If you turned on the broadcast, it sometimes appeared like some Valhalla, but the basic premise was the same.

The clan of demons attempting to manifest on Earth must be summoned at the boundary.

They must surpass the place where the transcendents and gods existed.

Thus, it was humanity's frontline.

A place where it was not unusual for wars to occur dozens of times a day.

'What a headache.'

I looked up at the sky resembling the Milky Way.

This place was like the moon.

A location where you couldn't see the blue sky like on Earth.

And a strange magic that made goosebumps rise on my skin was felt.

'The magic of those demon bastards.'

The sense of mana decaying, piled up in mountains of their corpses.

For beings who had become transcendents or gods, it might not matter much, but it was not good for Shin Yura.

I clicked my tongue in annoyance, yet nothing changed.

To escape from here, it seemed that I needed to meet Neung Seunghwa, who was masquerading as the Heaven-Surrendering Martial Emperor, or the Principal.

'The problem is I have no idea where they are.'

That was the problem.

There was no guarantee that causing a commotion here would work.

Perhaps the Demon King might show up.

Since I was unable to handle the Demon King right now, I had no choice but to use the Heaven-Surrendering Martial Emperor.

'I need to hide for now.'

I got a bad feeling.

It started right after using the Extreme Divine Thunderbolt. With that, I pierced through the domain, revealing my presence at the boundary.

'There might be someone nearby.'

So, I needed to hide for now.

"Ho, is this place perhaps that place?"

Shin Yura asked me in a flustered tone.

"Perhaps, it's the place called the Boundary."

"...The battlefield with demons where gods and transcendents gather."

"You seem to know about it?"

"Even if others don't, the direct descendants of the Five Great Clans would know."

"Really?"

"Yes, the principal often talks about it. This school is meant to nurture future transcendents, and she said you all have the most potential…"

"I do agree with that."

"Indeed, we have potential…"

"No, because I'm teaching you."

"…"

Shin Yura stared at me blankly, at a loss for words.

"Well, there's something more important than that."

"Something important?"

I gazed in one direction. A disgusting smell was emanating from there.

-Hoo, I was curious about the skill of the small fry here, seems like you have some skill.

A human-shaped being with lizard skin.

It was looking at me with an arrogant expression.

"The highest class of demons…!"

It seems you know who I am. I should kill you before other transcendents or gods appear…

"That's not the problem."

I lightly stepped with the Wind God's Steps.

Accelerated to the highest speed, I stood in front of the lizard guy.

Whoosh.

Ashen flames enveloped my fist.

Heaven-Surrendering Godly Technique.

Soul Crushing Strike.

Boom!!

A massive explosion erupted, and the body of the lizard human burst apart.

"There was a technique used to kill the evil spirit."

"…In one blow?"

"I don't want to waste time on such a small fry. Anyway, because of that, there will be other ones coming here. Should we flee?"

"You, you picked a fight here?"

"It just happened."

I lifted Shin Yura.

"W-Wait…?!"

"Sorry, but the situation is more urgent than expected. It seems I can't stay here leisurely."

He lifted Shin Yura by her waist and tucked her under his arm.

Then, Wind God's Steps.

Boom!

I accelerated quickly, activating the Wind God's blessing and using the power of the void.

I could feel eyes watching us from all around.

'I didn't want to use the Heaven-Surrendering Godly Technique or Divine Thunderbolt.'

Even for me, it was impossible to kill a high-level demon in an instant without using one of those two ultimate techniques.

But if I didn't finish it quickly, those who were watching would become a hassle.

'There's no change in the intensity of their gaze.'

My developed senses could even read the emotions behind the gaze.

I could tell from that.

Among those casting their gaze here, there was no one who knew the Heaven-Surrendering Godly Technique.

'Although I used the Heaven-Surrendering Godly Technique, which few can recognize.'

It was not as powerful as the Divine Thunderbolt.

The Lightning of Destruction was created together with the Duke of Extermination.

Her Extermination Thunder and my Divine Thunderbolt had too many similarities.

On the other hand, the Heaven-Surrendering Godly Technique was independent of the Heavenly Demon's Godly Technique.

They possessed resonating properties, but it was rare for anyone to recognize it at a glance.

'Though it's almost not a problem.'

As I quickly moved using the Wind God's Steps, the gazes I felt around me gradually disappeared.

'Except for the most intense gaze.'

The speed of that one was incredibly fast.

I think even a transcendent being wouldn't be outpaced by speed.

'Someone of my level, or slightly faster…!'

Swoosh.

I increased my speed further.

Then, a menacing aura suddenly surged.

The distance did not widen. It seemed like the other side was also coming at full speed towards me.

'What on earth is it?'

Who could it be?

Who was it that showed such hostility just from seeing my Heaven-Surrendering Godly Technique?

Several faces came to mind.

However, those who could surpass me had mostly disappeared as I scoured the Central Plains.

There were masters from the Four Evil Sects, and masters from the Demonic Cult, but they wouldn't show such hostility.

They would rather look at me with greedy eyes.

Or perhaps attempt to present me before the Heavenly Demon.

'An existence with whom I have enmity.'

Could it be the Demon King if it'was such an existence?

However, if it were the Demon King, they wouldn't reveal themselves so openly.

I was entangled with two of the Demon Kings, but I killed them all.

Who on earth is revealing such murderous intent towards me?

I must see the face of this one.

I activated my Heavenly Eyes to see them.

It was the Duke of Extermination.

"…"

I smiled slightly and increased my speed.

If she caught me now, I might die...!

At the Divine Sect.

There, the young cult leader was trembling.

One day, there was a sound like a bomb exploding.

The young cult leader thought it was the usual ruckus caused by the demons.

Normally, he would let them resolve it among themselves, but not now.

The living demon god.

Heavenly Demon.

That person was currently in the Heavenly Demon Cult.

So he personally stepped in to catch the culprits causing the commotion.

However, the Heavenly Demon was already there.

With an extremely angry expression.

He didn't know the details.

But he could guess that the groom of the wedding the Heavenly Demon mentioned had escaped.

'To dare run away from the Heavenly Demon's wedding!!'

The young cult leader was furious.

Meanwhile, the Sword Demon was sweating coldly.

'Heaven-Surrendering Martial Emperor, that crazy bastard.'

The Sword Demon had always known he wasn't normal.

From the start, he was the type to beat up the heads of noble families in the Divine Sect just because he didn't like them.

He knew from then that he wasn't in his right mind.

However, he remembered the time when, along with the Heavenly Demon, he went out to unify the Outer Martial World and left for the Central Plains on his own.

In less than two years.

In that short time, he turned the entire Central Plains into his enemy and leisurely escaped their tightly woven net.

Then he even turned the Evil Sects into his enemies.

The Sword Demon wanted to know what the hell this guy was doing, but he held back.

Because in that time, he had grown to be an equal transcendent to the Heavenly Demon.

No, rather, he saw it as an opportunity.

With two transcendents leading them, they would attack the weakened Central Plains.

In that case, unifying the Demon Sect would be only a matter of time.

However, he clattered off on his own, causing the Bloodshed of Mount Hua, and died.

'That damn bastard.'

How much trouble had he caused?

Despite the title of Sword Demon, he diligently took care of the cult.

He looked at documents so much that even his sword rusted.

Others might ask how dare he run away from marrying the Heavenly Demon.

'If it's him, it's possible.'

If it were the Heaven-Surrendering Martial Emperor, it wouldn't be strange for him to flee.

When the Heavenly Demon first tried to unify the outer martial world, she intended to hold a wedding, but he abandoned the Heavenly Demon to venture into the Central Plains with the Demon Dragon Princess and the Rakshasa Witch.

That damn bastard would indeed flee.

'There's something slightly concerning.'

The tomb of the Heaven-Surrendering Martial Emperor.

There were no traces of him there.

Rumors spread throughout the Central Plains that he was injured somewhere.

The Sword Demon led the group to investigate that place.

And the tomb of the Heaven-Surrendering Martial Emperor.

There were similar traces there.

'To think he wounded the Heaven-Surrendering Martial Emperor back then.'

It was hard to even imagine.

What kind of existence was the Heaven-Surrendering Martial Emperor?

Wasn't he the monster who could lift a mountain with his strength and withstand ordinary sword strikes with his bare body without getting hurt?

Anyway, the most urgent thing now was to calm the Heavenly Demon's anger.

What could be the way to calm her anger?

'Was it Yoo Eunchae?'

The companion of the Heaven-Surrendering Martial Emperor.

He said he would teach her personally, which piqued his interest.

At first glance, it didn't seem like much, but his senses said otherwise. It felt like a few moves were carefully hidden.

"There is a way to the academy for now."

"Academy?"

When the Heavenly Demon reacted, the Sword Demon quickly spoke.

"Heaven-Surrendering… Han Seojin is currently in the position of head professor. Teaching kids at the academy…"

"Professor…"

The Heavenly Demon, Cheon Murin, briefly thought about Han Seojin.

He used to be manly, but now he had become delicate.

Appearance wasn't that important. Even if Han Seojin was just an ordinary man or even ugly, the Heavenly Demon would still love him.

And appearances could improve with a few transformations.

However, the Heavenly Demon had one thought.

Glasses.

Han Seojin wearing those.

'…Surprisingly not bad.'

Thinking of that, it wasn't too bad.

No, that was not the important thing.

"Heaven-Surrendering… No, there was a trace at the place Han Seojin escaped from, as if space had been distorted."

"…"

The Sword Demon swallowed.

A trace as if space had been distorted?

Few could do it.

And among those who could, a figure naturally came to mind.

'The Principal?'

A transcendent of space.

If it was that existence, it was entirely possible.

"How dare a mere child…"

The Heavenly Demon quietly seethed with anger.

"One should know one's age. To dare challenge Han Seojin, when there's nearly a century's difference."

"…"

The young cult leader remained silent. In terms of age, the Heavenly Demon was older, but that wasn't important.

'If it's something the Heavenly Demon does.'

It was as such.

"Tsk, it's done. Perhaps they've gone to the boundary."

While the young leader stayed silent, the Heavenly Demon contemplated.

The Boundary.

It was highly likely they were taken there.

The swirling space was unusual.

With such ability, they could even transcend dimensions.

In reality, the principal used those things.

'It can't be helped.'

An existence known as the Duke of Extermination.

She tried to secretly and quickly hold the wedding before that existence could see what she was doing.

'It can't be helped now.'

In this situation, she has no choice but to hold the wedding in front of her.