The book lay open on the stone altar, its ancient pages filled with economic symbols, equations, and cryptic riddles. The moment the group had unlocked it, the jungle had gone silent—as if the island itself was waiting.
Dawood, standing near Fang Yuan, ran his fingers over the pages. "This isn't just a book. It's a contract."
Ayanokōji's sharp eyes flicked across the text. "A contract… with the island?"
Moriarty smiled. "More like a ledger of survival. If National Income Accounting defines how a country measures its economy, then this book defines how the island measures us."
Fang Yuan's gaze darkened slightly. "Then we aren't just players in this game. We are its economy."
Dazai whistled. "Ahh, so we're living assets now. What a refreshing existential crisis."
Bai Ning Bing folded his arms. "Enough talk. If the book is open, we start solving it."
Aizen chuckled, but his expression was unreadable. "Indeed. But I suspect the island doesn't intend for this to be easy."
Yuuichi tapped his chin, grinning. "Then let's see what happens when we solve its puzzles faster than it expects."
And so, the real game began.
---
The First Riddle – The Wealth of the Island
The first page contained a simple yet cryptic question:
"What is the true wealth of a nation? Solve this, and the island shall grant you its first key."
Moriarty smirked. "Ah. A fundamental question in economics. What determines wealth?"
Ayanokōji's voice was calm. "Most assume it's money. But that's a surface-level answer."
Dawood nodded. "If this island functions as an economy, then wealth must be measured differently."
Fang Yuan spoke next. "Wealth isn't currency. Wealth is production. Resources. Power."
Aizen traced his fingers along the book's edge. "And if we are part of the island's economy, then its wealth is us."
Click.
The book's pages shifted.
New text appeared beneath the question.
"Correct. The wealth of any nation is not its money, but its ability to produce, innovate, and control resources. The first key is granted."
A low rumble came from the jungle.
Bai Ning Bing tensed. "What now?"
Dawood's eyes flickered toward the trees. "The island isn't just testing our intelligence. It's testing if we understand what it values."
Fang Yuan's smirk widened. "And if we fail… it eliminates us."
---
The Second Riddle – The Broken Equation
As soon as the first puzzle was solved, the second appeared in shifting text.
A set of numbers and variables formed on the page:
Y = C + I + G + (X - M) + ?
Ayanokōji's eyes narrowed. "This is the GDP equation… but it's incomplete."
Dazai grinned. "Ah, a missing piece? A twist in the standard formula?"
Moriarty studied the equation. "Consumption, Investment, Government Spending, Net Exports… and one unknown factor."
Yuuichi whistled. "So, what's the missing piece?"
Aizen, ever perceptive, smiled slightly. "The island doesn't just test logic. It tests comprehension. What does GDP fail to measure?"
Fang Yuan answered instantly. "Human effort. Unpaid labor. The hidden economy."
Dawood nodded. "Black markets. The informal sector. Things that exist outside of formal records."
Click.
The book responded.
"Correct. The missing variable is the unmeasured force that drives all economies—the unseen work, the forgotten effort, the real power behind the numbers. The second key is granted."
The jungle shivered.
A growl echoed from deep within the shadows. Something was coming.
---
The Jungle Fights Back
A figure moved in the trees. Not an animal. Not a beast.
Something worse.
Dawood was the first to react, stepping into a defensive stance. "We're not alone."
A rustling sound came from all around them. The jungle was shifting—no, it was reacting to the book's progress.
Bai Ning Bing cracked his knuckles. "Tch. Guess the island doesn't like being figured out."
Fang Yuan's smirk didn't fade. "Then let's prove we're more than just pieces in its game."
A shadow lunged from the trees.
Aizen moved first.
His hand flicked, and in a split second, his sword sliced through the darkness, splitting the creature in half before it even landed.
Blood splattered onto the altar.
But more creatures were emerging—from the trees, from the ground, from places that shouldn't have held life.
Dawood exhaled. "Defend the book. No matter what."
Yuuichi smirked. "Oh? Now this is getting fun."
And so, as the monsters swarmed, and the jungle turned against them, the battle of knowledge and survival continued.
---
The jungle erupted.
From the shadows, figures moved—not quite human, but not entirely beast either. Their bodies twisted unnaturally, their limbs elongated, their eyes glowing with the same eerie awareness the island seemed to possess.
They weren't just creatures. They were enforcers. The island's way of ensuring that its tests remained deadly.
And now, they were here to collect a debt.
Dawood's stance remained calm, but his muscles were taut. The book was the real prize, and the island wouldn't let them take it without a fight.
Fang Yuan, standing beside him, exhaled slowly. "It seems knowledge comes at a cost."
Bai Ning Bing cracked his neck, grinning. "Then let's make the island pay, too."
Aizen's sword gleamed in the dim light. "Don't fall behind."
Moriarty, Ayanokōji, Dazai, and Yuuichi remained near the book. Their job wasn't to fight—it was to solve.
Because this wasn't just about strength.
The only way to truly win was to beat the island at its own game.
---
The Third Riddle – The Value of a Nation
Moriarty ran his fingers over the next passage in the book. As expected, the text had changed again.
The riddle was waiting.
"What makes a nation rich? Solve this, and the island shall grant its third key."
Ayanokōji's mind was already working. "It's another fundamental question. We know wealth is more than money. But what determines a nation's strength?"
Dazai tilted his head, smiling. "Isn't it just resources?"
Moriarty shook his head. "No. A country can have resources and still be poor. Think of nations with vast natural wealth but weak economies. There's something more fundamental."
Yuuichi, watching the battle unfold in the background, grinned. "Then let's figure it out before we get eaten."
Aizen effortlessly dodged a swipe from one of the creatures, his blade moving in a perfect arc to decapitate it mid-motion. He barely even glanced at the others. "You're running out of time."
---
The Jungle's Wrath
The creatures were fast. Too fast.
Dawood had already moved, his Punisher Gu activating.
One of the beasts lunged straight at him—and then its own body twisted violently, its limbs snapping inward as it howled in agony.
Fang Yuan barely reacted as another came at him. He sidestepped with absolute precision, his fingers moving just fast enough to break the creature's spine.
Bai Ning Bing wasn't dodging. He met them head-on.
He let one creature tear into his arm, only to grab its jaw and rip it apart with sheer brute force.
Aizen sighed. "Sloppy."
Bai Ning Bing smirked, wiping blood from his face. "Effective."
But they weren't infinite. No matter how strong they were, the jungle could keep coming.
The book had to be solved.
---
Solving the Riddle – The True Wealth of a Nation
Dazai suddenly laughed. "Ahh, how obvious."
Moriarty raised an eyebrow. "You have something?"
Dazai grinned. "It's people. A nation's wealth isn't its land or its resources. It's the intelligence, labor, and creativity of its population."
Ayanokōji nodded. "It explains why some resource-rich nations remain poor while others, with minimal resources, thrive."
Moriarty smirked. "The economy is a reflection of its people's ability to innovate and adapt. That is the true source of wealth."
Yuuichi clapped. "Well then. Let's see if the island agrees."
Ayanokōji pressed his hand against the text.
The book reacted instantly.
Click.
The stone beneath their feet shifted—and a new passage was revealed.
"Correct. The wealth of a nation lies in the strength of its people. The third key is granted."
But the island wasn't finished.
A new message appeared beneath it:
"The final key is the hardest to obtain. Prepare."
The jungle roared.
---
The Final Test – The Economy of Betrayal
As soon as the message appeared, something changed.
The air grew colder. The jungle stopped moving. The creatures froze in place.
And then—
One of them spoke.
Not in snarls. Not in howls.
In perfect, human speech.
"You have taken what belongs to the island," it said. Its voice was deep, ancient, something not of this world.
Fang Yuan's eyes narrowed. "And what does the island want in return?"
The creature's face twisted into a grin.
"A trade. Knowledge for loyalty. One of you must betray the others."
Silence.
Dawood's fingers twitched. The Punisher Gu reacted instantly, sensing an incoming threat.
Aizen's smirk didn't fade. "And what happens if we refuse?"
The jungle shuddered.
"Then the economy collapses. And you all perish."
Dazai sighed. "Ahh, a betrayal clause. How unfortunate."
Bai Ning Bing scoffed. "We're wasting time. We don't betray our own."
Fang Yuan chuckled. "Don't we?"
The group turned toward him, but he merely smiled. He wasn't denying it.
The island had set its final test.
---
The jungle was silent.
The creatures had stopped attacking. The book had granted them three keys—but the final test still remained.
"One of you must betray the others."
The words echoed like a death sentence.
Fang Yuan's smile was unreadable. "A test of intelligence. But also a test of economic decision-making."
Moriarty exhaled, intrigued. "So, the island isn't just testing if we know the answers. It's testing how we act under pressure. A forced trade-off."
Ayanokōji nodded. "This is a classic dilemma in economic systems. Sacrifice something now to gain something later, or refuse and risk total collapse."
Dawood's fingers tapped against the Punisher Gu, thinking. "The island isn't just testing us. It's learning from us. Adjusting its strategies based on our responses."**
Aizen smirked. "Then the real question isn't who betrays whom. It's whether we can break the system."
The Shadow Economy – The Hidden Puzzle
Dazai tilted his head, reading the new text forming in the book. "Ahh, here's the catch. The final key isn't about betrayal—it's about an unseen market."
Moriarty's sharp eyes scanned the passage. "It's introducing the concept of a shadow economy."
Ayanokōji explained. "Every economy has an official system, measured by GDP, taxes, and trade. But there's always a hidden layer—the underground economy. Black markets. Unregulated trades. Off-the-record transactions."
Fang Yuan smirked. "So, the island is hinting that the economy it has shown us isn't the full picture. There are hidden variables."
Yuuichi grinned. "And what happens when you only measure half the data? You get a false reality."
Dawood's voice was calm, but precise. "Which means everything we've done so far is incomplete."
Bai Ning Bing scowled. "Then how do we fix it?"
Aizen's smirk widened. "We find what the island isn't telling us."
The Hidden Inflation Trap
The book's next puzzle appeared.
"The island's GDP appears stable, but in truth, it is falling. Find out why before the system collapses."
Moriarty's grin widened. "Ah. Inflation."
Dazai chuckled. "A hidden drain on resources, slowly devaluing everything."
Ayanokōji analyzed the clues. "In real-world economics, GDP growth can be misleading. If inflation isn't accounted for, economic output may seem high while real purchasing power falls."
Dawood's eyes narrowed. "Then the island is hiding something that's been draining our economy."
Fang Yuan glanced at the creatures watching them. "I suspect… it's the island itself."
Aizen nodded. "If we don't solve it, our entire economic system collapses—meaning, we die."
A Choice of Scarcity – The Prisoner's Dilemma
The book shifted again.
A new set of numbers appeared.
Two choices:
1. Spend all current resources to stabilize the economy—but risk losing future opportunities.
2. Let the hidden economy continue, gaining short-term advantage—but eventually face a major collapse.
Dazai laughed. "Ahh, a classic economic gamble. Short-term gain versus long-term sustainability."
Moriarty's smile sharpened. "It mirrors the Prisoner's Dilemma. If we all agree to stabilize the economy, we survive. But if even one of us defects—if one of us prioritizes personal gain—we all lose."
Fang Yuan's expression remained neutral. "A zero-sum game."
Ayanokōji nodded. "It's a test of trust. And considering this group…"
Yuuichi smirked. "Trust isn't exactly our specialty."
The Deceptive Choice – Fang Yuan and Dawood's Move
Dawood was already thinking ahead. "The island expects us to follow the logic of scarcity. To fight over limited resources. But what if we reframe the problem?"
Fang Yuan's smirk deepened. "What if we manipulate the system itself?"
Moriarty raised an eyebrow. "Go on."
Dawood's eyes glowed slightly. "The island is forcing us to choose between resources and survival. But if we recognize that the 'hidden economy' is draining our value, then the correct choice isn't to spend or hoard."
Aizen's eyes flickered with understanding. "Ah. It's to reset the market."
Ayanokōji nodded. "Destroy the false system and rebuild it under our terms."
Fang Yuan's voice was smooth. "Which means we don't just choose between the options given."
Dazai grinned. "We change the game entirely."
Breaking the System – The Final Key
Dawood moved first, pressing his hand to the book.
"The problem isn't scarcity. The problem is the system itself."
Fang Yuan followed, speaking clearly. "We reject the forced trade-off. Instead, we create a third path—where the hidden economy no longer controls the outcome."
The book shook violently.
The jungle groaned.
The creatures hissed, stepping backward.
The island had not expected them to reject its false economy.
A new message formed.
"You have understood. The true economy is not what is measured, but what is controlled. The final key is granted."
And then—
The ground cracked.
A new path opened, leading deeper into the island's core.
Aizen chuckled. "And just like that, the island loses again."
Moriarty smirked. "For now."
Dawood glanced at Fang Yuan. They had worked together—but they were both aware.