You think you're worthy of saving the world?

"A room made of prisms..."

Yuri couldn't help but recall the Bruce Lee movies he had watched as a child in his previous life.

All the prisms were spotless, reflecting the figures of the hero and the demon king like a kaleidoscope.

In the very center of the Prism Room is a golden treasure chest inlaid with gemstones.

"That is... the item for resurrection..."

Rosalia murmured to herself.

She covered her mouth, tears welling up in her eyes.

I never expected it to go so smoothly...

There really is an item that can revive Celestia!

But Yuri felt a sense of unease.

He had already surveyed the area from outside, and then carefully inspected it again upon entering the Temple of the Mirror.

I didn't see that guy...

Double Phantom Fies...

Where did that guy go?

"Yuri, let's go."

"Ah... um."

Rosalia grabbed the boy's wrist and led him toward the treasure chest.

The golden treasure chest was unlocked, and Yuri opened it.

Then, lying quietly inside, was a note—

There is only one line on it.

"You've been fooled, you idiot!"

Yuri: "..."

Rosalia: "..."

The two stared blankly at the sarcastic words on the note, speechless for a long time.

"Wait... what's going on?"

Rosalia's lips trembled, and her pupils quickly welled up with tears.

"Didn't you say there would be one! Yuri! Didn't you say there would be an item to revive Celeste!?"

She grabbed Yuri's collar in agitation, and questioned him loudly with a sob in her voice.

"........."

Yuri just stared blankly at the note in his hand, without saying a word.

"Feel sorry……"

Rosalia suddenly came to her senses and loosened her grip on Yuri's collar.

"I was too emotional... I shouldn't have taken my anger out on you... Yuri, you're the one who's most heartbroken..."

After saying this, she collapsed to her knees, covering her face with her hands.

The Grand Duchess's helpless sobs echoed in the quiet Prism Space.

"Rosa..."

Yuri patted her on the shoulder.

The Grand Duchess raised her head and looked back at him.

"Doesn't this handwriting look familiar?" Yuri said, staring at the note.

"?"

Rosalia took the note from Yuri and began to examine it, her voice choked with emotion.

"That sounds familiar... I do feel like I've seen it somewhere before... Where exactly was it...?"

Yuri took the note again.

I stared at the words above and began to think.

"You've been fooled, you idiot!"

I was scammed... but which one exactly?

Does it refer to the situation where someone is told the location of the "resurrection item," rushes over excitedly, only to find nothing?

Do not!

From the very beginning, no one told me that there were any so-called resurrection items; it was just wishful thinking on my part!

So, what exactly was the "content" that led me to be deceived?

"…………!"

Suddenly, a strong chill ran down Yuri's spine.

and many more……

Could it be that……

A chilling, insane thought surfaced in Yuri's mind.

How could such a thing happen...

The black-haired boy's shoulders trembled violently.

Yuri gripped the note tightly and asked in a trembling voice.

"Hey... Rosalia... tell me, how many of the Demon King's Four Heavenly Kings are left?"

The question was rather absurd. Rosalia paused for a moment before answering, "There's one left."

“That’s right, there’s one left…” Yuri nodded. “Who is that person?”

Rosalia pinched her chin: "Let's not count Frankenstein, the substitute one of the Four Heavenly Kings..."

The four kings you and Celeste defeated included the succubus Lilith, the troll general Zalaka, and the black dragon Fafnir...

Therefore, there should be only one of the Four Heavenly Kings remaining—the lich Leoric, who has already betrayed me.

"I see."

Yuri nodded thoughtfully.

Troll General...

Ah, that guy who led the Demon King's army to besiege the town before, but was instantly killed by Celeste before he could even give his name...

Was that guy one of the Four Heavenly Kings?

No wonder……

"Yuri, what exactly are you trying to say?" Rosalia frowned slightly.

The boy calmly said, "In my opinion, there should still be one of the Four Heavenly Kings of the Demon King's Army left... but it's not Leoric. Those who betray should be removed from the list."

“But if Leoric is counted as being removed from the list, then there won’t be any Four Heavenly Kings left…?” Rosalia said.

"How could that be? Isn't there still one person left?"

With a strange smile, Yuri said, "Double Phantom Fies... the guy you personally appointed as one of the Four Heavenly Kings."

"!?"

Rosalia's mouth dropped open.

Her expression showed nothing but confusion.

"Double Phantom Fies...who is that?"

Rosalia, the Demon King, was surprisingly unaware of the great demon named Fies—

This is of course.

because--

Yuri slowly walked to the largest mirror in the Prism Room.

On the mirrored surface, the figure of a young man appeared, dressed in black armor as a headless knight and shrouded in an ominous aura.

Yuri explained calmly.

“I am the last of the Four Heavenly Kings, the Double Phantom Faith… the guy you will appoint as the next of the Four Heavenly Kings.”

The evil spirit he saw that night was Euryphus Falción from the future.

This Mirror Temple is a room where you can "go back to the past".

179. Deceiving yourself, deceiving the world.

"This temple hides a secret that leads to the past...?"

Upon hearing Yuri's words, Rosalia naturally showed a shocked expression.

"Time travel...is that even possible?"

Yuri smiled and replied, "Of course it's difficult... if it were in the real world."

After all, the sheer amount of energy required to reverse time in the entire universe is beyond imagination.

But don't forget, this is a singularity in the dream world...

The biggest challenge in time-based operations—the energy demand—is not as exaggerated as some might think.

With a well-structured and complete spell, and by investing the appropriate amount of magic, time reversal can be achieved.

Amid the Grand Duchess's stunned expression, Yuri uttered his bold hypothesis: "Perhaps the principle of time reversal was already set in when this fictional world was created, and all we have to do is use it."

If an RPG doesn't have a Save/Load feature, can it still be called an RPG?

This is the basis for Yuri's conjecture.