Book 1 Chapter 787

As the three people's mouths moved while facing Leo confronting the Undead King.

Goooooo-!

A deathly aura emanated from the Undead King's body.

As the three felt their hair stand on end from a murderous intent incomparable to moments before.

Fwoosh-!

Leo drew his sword and swung it.

At the same time, a giant wave of flames surged before Leo's eyes.

Chelsea's eyes widened as she saw it.

"This is… Schrödinger's Aura?"

Of course, it was incomparable to the power of Schrödinger's flames that Chelsea had seen.

However, as a sorcerer from Rwallyn, Chelsea recognized Schrödinger's flames at a glance.

Fwhaak-!

Dark red smoke flowed out from within the flames, pushing back the aura of flames.

The smoke that pushed back the flame aura began to spread at a rapid pace.

Leo squinted his eyes and retreated as he saw it.

Swish-!

At that moment, a blade made of bone flew through the smoke.

However, the bone blade was not aimed at Leo.

Thump-! Thump-!

As Leo retreated, he grabbed Chelsea and Illyana by the scruff of their necks.

"Prepare to land."

Fwhaak-!

Without waiting for a response, Leo threw the two of them backward.

"Kyaaaaaak?!"

"Kyaaak!"

The screams of Chelsea and Illyana, who seemed to be moving away, echoed.

"Wh, what… Ugh?!"

Leo rotated his body and pushed the sword's abdomen with his shin.

He didn't kick it, but literally pushed it, so there was no impact.

Of course, the immense pressure felt in his abdomen and the wind pressure felt on his back made him scream involuntarily.

The direction the sword flew was exactly where Chelsea and Illyana had flown.

The two girls, who had been screaming, soon regained their senses and landed on the ground.

Chelsea gritted her teeth and moved her feet quickly.

As the fastest third-year student at Lumern, Chelsea arrived at the direction the sword was falling before Illyana.

"Ughhhhhhh!"

As the sword's scream was heard, Chelsea spread her arms.

Whoooosh-!

A soft wind swirled, successfully cushioning the sword like a cushion.

Gulp-!

"You saved me! Prince!"

As Kal, who had been embraced in a princess pose, covered her mouth with both hands and put on a touched expression, Chelsea shouted with all her might.

"Are you joking in this situation?!"

And then she threw Kal to Illyana, who was following behind.

As Illyana caught Kal, Chelsea immediately spun around and looked in Leo's direction.

The dark red smoke was engulfing them like a fog of death.

"Hoo! Ha!"

Chelsea closed her eyes and took a deep breath, then opened them wide.

Goooooo-!

Then, a powerful magical energy began to surge from Chelsea's body.

The soft breeze that had been blowing, causing her clothes to flutter as if they were expanding, soon became a strong wind, pushing away the surrounding air.

Chelsea, gripping her staff, unleashed a magic spell.

"Cyclone."

Whooooooosh-

A fiercely swirling vortex began to suck in and absorb the deathly smoke emitted by the Undead King.

Kuaaaaaaaa-!

Chelsea gritted her teeth.

'It's hard to maintain the magic!'

The strong dark magic of the Undead King contained in the smoke felt like it would destroy the magic formation at any moment.

As Chelsea gritted her teeth.

Tap-!

Leo, who had retreated through the smoke, stood beside Chelsea.

Chelsea's eyes met Leo's for a moment.

"Help…"

"You can withstand this much, can't you?"

"……!"

"Celia Schrödinger would have endured it."

At Leo's words, Chelsea gritted her teeth.

Flames shot from Chelsea's eyes.

Gritting her teeth, Chelsea squeezed out more magic.

Kuaaaaaaaa-!

Leo, watching the stronger wind, let out a smirk.

'No matter where, Celia is the best at provoking Chelsea.'

And then he looked straight ahead.

Fwhaak-!

Chelsea's magic pushed back the dark magic of the Undead King Hel Kaiser.

Stomp- Stomp-

Saaaaaah-!

With that, Hel Kaiser walked forward.

The plants in his path all withered and died.

Chelsea flinched as she saw him.

Swoosh-

Leo stood in front of Chelsea.

"Leo?"

Chelsea, her eyes wide, looked up at Leo.

Leo looked back at Chelsea and said.

"Don't be scared. I'm here."

"……!"

Chelsea's eyes widened.

In a situation where she was facing Hel Kaiser, the Commander of Tartarus, the Undead King, not anyone else.

In such a situation, he told her to trust him and not be scared. Normally, Chelsea would have told him to stop talking nonsense.

But for some reason, Chelsea felt reassured.

It was because she felt the strength in Leo's words.

'She's like Leah unnie.'

Chelsea felt her heart pounding.

Meanwhile, Hel Kaiser stared intently at Leo with his dark red eyes.

Goooooo-!

Then, an immense killing intent erupted from Hel Kaiser's body.

Leo, seeing this, said to Chelsea.

"Join Kal and Illyana. And get as far away as possible."

"Uh, yeah."

Chelsea nodded and ran towards Kal and Illyana.

Then she stopped and said.

"You'll come back safely, right?"

To that question, Leo chuckled.

"To do something to me, you'd have to bring your student council president."

With Leo's words, which were half joke and half truth, Chelsea felt an inexplicable sense of relief and moved away.

As Chelsea moved away, Leo said.

"What are you doing? Not attacking?"

"It's been a while, Hero Who Survives."

Hel Kaiser said indifferently.

Leo smirked as he looked at Hel Kaiser.

"You must be thrilled to see me?"

"Unfortunately, I'm neither thrilled nor feel like I'm going mad."

Hel Kaiser smirked.

"I just feel like an unpleasant uninvited guest has arrived."

At those words, Leo's eyes twitched.

"How did you end up here? Stranger."

'How did he know?'

"You look curious about how I knew."

Hel Kaiser let out a low laugh.

"I was aware that the other great heroes, except for you, had been reborn."

"Ho? You seem quite relaxed for someone who knows that."

"If you don't exist, what does it matter if those four do? If you're not here, the same thing that happened 3000 years ago will repeat."

Hel Kaiser sneered.

Those words meant that without Leo, their natural enemy in Erebus, they were confident of victory.

"What we feared most was your rebirth into this world."

If all the great heroes in their complete forms appeared in this land, Erebus would finally be over.

"But you couldn't reincarnate in the end. Hero Who Survives. It means such things don't happen in this world's timeline."

"Even though I'm right here?"

"You are just an anomaly in this world."

Hel Kaiser's eyes flashed.

"My eyes cannot be deceived, Hero Who Survives. I can see it."

Leo's image was reflected in the dark red glow.

"The lingering resentment of the Demon Queen and Giant King that dwells within you. The grudges of the legion commanders who died by your hand."

As the Undead King who controlled death, he had seen through it.

The deaths of the Demon Queen and Giant King.

"My brethren are still alive. Yet, the trace of death they left behind is visible in you for only one reason."

Hel Kaiser smirked.

"Because you are a being from another world. What can you possibly do here, you who must return to your original world?"

"Haven't you ever thought that I might stay here forever?"

"Kuhuhuhu… Khahahahahahahaha!"

Hel Kaiser burst into maniacal laughter.

"You tell a funny joke, Hero Who Survives. Just as you know us well, I know you better than anyone."

Wisdom flickered in Hel Kaiser's eyes.

"If you were only of that caliber, the god would not have been killed by your hand."

"……"

"I will give you a good gift, you who will soon return. A gift called suffering."

Hel Kaiser cursed Leo with a smirk.

"Even if you win in your world, you will carry the burden of this world's events and suffer for eternity."

At Hel Kaiser's curse, Leo smirked.

"That's why you lost."

"What?"

"Remember, Hel Kaiser."

Leo put strength into his sword.

"My damn companions."

There was absolute faith in Leo's eyes.

"There's no way they can't defeat Erebus just because I'm not there."

Leo's eyes flashed.

"Whether I'm here or not. We always win."

Hel Kaiser did not believe that Tartarus in another world, where the Demon Queen and Giant King had died, would win.

But Leo was different.

He showed absolute faith in his friends.

"Just pray at the last moment."

Leo pointed his sword at Hel Kaiser.

"That you guys won, even in another world. Well, that won't happen, of course."

Anger flickered in Hel Kaiser's eyes.

The faith in Leo's eyes was enough to make him uncomfortable.

Flash! Kuaaaaaaga-!

Leo's sword and the bone blade summoned by Hel Kaiser crossed.

Leo's gray aura and Hel Kaiser's dark magic swirled.

Their battle turned the surrounding area into a wasteland, as if a natural disaster had occurred.

A moment later.

Leo clicked his tongue as he saw Hel Kaiser, who had disappeared.

'Tch.'

Hel Kaiser did not fight properly.

He merely gauged the situation and retreated.

'Annoying fellow.'

Leo, sheathing his sword, took a deep breath.

'He seems to know about parallel worlds.'

The Undead King had lived for an immeasurable amount of time.

He had lived long before the Age of Calamity, so it was not strange for him to have knowledge of parallel worlds.

'He said I would return soon.'

Thinking so, Leo took out a watch from his pocket.

Click-

Leo's eyes widened as he opened the lid.

The watch, which had barely moved in seconds, was now moving almost a minute at a time.

'When did this…'

Leo, with a surprised expression, quickly composed himself.

'…Time is accelerating.'

He intuitively realized.

When this watch moved normally.

He would be leaving this place.

Leo, who had put away his watch, fell into thought.

'The Undead King knew that the others had reincarnated.'

That explained why countless events that had happened in his own timeline had not occurred here.

'Tartarus is moving as secretly as possible.'

Without him, they would have thought time was on Tartarus's side.

Furthermore, if they fought rashly with the great heroes, Tartarus itself could be destroyed.

'In the end, they were a restraint.'

In such a situation, the Undead King had moved so extensively.

Then…

'It might mean that what has been suppressed is about to explode.'

As Leo reached his conclusion.

"Oh! Leo!"

The group, who had moved far away to avoid getting caught in the fight, approached.

"Amazing! To fight head-on with the Undead King!"

"H-He was such a powerful individual… I-I didn't know that…"

Chelsea's eyes widened and she smiled brightly, while Illyana reacted timidly.

"You know, Leo, won't you transfer to Lumern? Sister Leah will definitely try to recruit a skilled person like you! If you take the first party spot in the third year, someone will come to the second party. Then I might be able to live a more comfortable school life!"

Chelsea's eyes sparkled.

"I, I might not even be able to be in the second party…"

Illyana drooped her shoulders with a voice lacking confidence.

Leo, looking at them, beckoned them with his fingers.

The two, with puzzled expressions, approached Leo.

"I'm older than you. Call me oppa."

"Kyah?!"

"Why are you so timid and dejected?"

"Kyaang?!"

Leo pinched their noses and shook them vigorously.

Leo, releasing the two who were struggling, said.

"It seems like you two need to fix your mental state."

"What?!"

"S-Suddenly?"

"You're too insincere, and you're too dejected."

Chelsea and Illyana hunched their necks at Leo's remark.

Seeing the two like that, Leo said.

"Chelsea."

"Why are you calling me, Leo… oppa."

"Shall I teach you a magic that can defeat Celia Schrödinger?"

"What?! Really?!"

Chelsea showed immense interest.

"Illyana."

"Uh, yeah…"

"I'll teach you a magic that will allow you to become the 'Light-Speed Swordswoman Illyana'."

"L-Light-Speed Swordswoman?"

Illyana had a very intrigued expression.

The two walked different paths than the two Leo knew.

So, although they appeared different from what Leo knew, it did not change the fact that they were essentially Chelsea and Illyana.

"Train with me for a week. I'll make you win against the first party."

"Pfft."

"You're exaggerating."

Chelsea and Illyana looked at him with disbelief.

"Still, maybe I'll believe you for the sake of it."

"I-I'm also interested."

Chelsea and Illyana considered receiving training.

Leo smiled as he looked at the two.

At that moment, Kal felt a chill run down her spine.

"I-I'm exempt, right?"

"No. You have to do it too."

"……"

Kal wore a mournful smile.

And then asked.

"Hey, Leo."

"Yeah?"

"You seem to know us too well? Have we really met somewhere before?"

At Kal's words, Leo chuckled.

"Perhaps."