Chapter 1: The Day the Crimson Sky Split Open

The morning in Tempest began like any other day—calm winds rolling over the vast forests of Jura, sunlight spilling gently across the bustling city that had grown faster than anyone once believed possible. Merchants called out near the markets, goblins carried goods with proud efficiency, and beastmen children ran through the streets without fear. At the center of it all, Rimuru Tempest observed the harmony he had worked so hard to build, seated casually in his office while paperwork stacked itself into a problem he pretended not to notice too deeply. Beside him, Shuna carefully organized documents with calm precision, while Shion… unfortunately organized them in her own enthusiastic but destructive way.

Before long, the peaceful rhythm of the day was interrupted not by politics or paperwork, but by a strange shift in the air. It was subtle at first—a faint pressure that made even seasoned warriors pause mid-step. The sky above Tempest, once bright and endless, began to ripple as though reality itself had been disturbed by an unseen hand. Clouds twisted unnaturally, forming thin crimson streaks that spread across the heavens like cracks in glass. The citizens stopped what they were doing, eyes slowly rising in confusion and unease.

Rimuru felt it immediately. His relaxed expression faded as he stood, his awareness extending across the entire city. Something was wrong—not in the sense of an invading army marching at the gates, but something far more unnatural, as if the world itself had been slightly bent out of shape. Benimaru arrived at the office almost instantly, his hand already resting on his blade. “Lord Rimuru,” he said sharply, “something is happening outside the walls. The sky—”

“I see it,” Rimuru interrupted, his tone calm but serious now. He stepped toward the window, gaze locked upward. The crimson cracks widened, and from within them came a faint sound like distant thunder echoing through water. The air trembled. Then, without warning, the first tear opened.

A violent surge of wind erupted across Tempest as something tore through the sky. From the rip in reality, shadowed shapes began to fall—creatures unlike anything the city had seen before. They were not mindless beasts, but warped forms of magical life, twisted by whatever force had pulled them through. Some crashed into the forest outside the city, shaking the ground. Others landed within the outer districts, immediately causing panic among civilians.

“Defense units, move!” Benimaru ordered, vanishing from the office in a flash of speed. Rimuru followed right after him, his body transforming fluidly as he moved through the air, landing atop one of the city walls. What he saw made even him narrow his eyes—massive wolf-like creatures with jagged crimson fur were tearing through barriers, while winged beasts with fractured wings circled above, screeching as they attacked anything that moved.

Without hesitation, Rimuru gave his command. “Protect the civilians first! Don’t let them reach the inner city!”

The warriors of Tempest responded instantly. Gobta, trembling but determined, charged forward with Ranga by his side. Shion met one of the beasts head-on, her massive blade crashing down with enough force to split stone, sending one creature crashing into the ground. But the creatures were relentless. Every time one fell, another seemed to crawl out from the lingering cracks in the sky.

Rimuru leapt into the battlefield, his movements precise and fluid. He avoided a charging beast and struck it with a compressed burst of magic, sending it flying into a tree line. Yet even as he fought, his attention remained divided—watching the sky, analyzing the pattern. These weren’t random monsters. They were being released in waves, as if something on the other side was testing the strength of Tempest.

Benimaru appeared in a burst of flame, cutting through a group of beasts with a single sweeping strike. “They keep coming! There’s no end to them!” he called out.

“Then we close the openings!” Rimuru replied immediately. He raised his hand, shaping magic carefully—not to destroy the sky itself, but to stabilize the space where the tears were forming. But the moment his energy reached upward, a violent backlash struck him, throwing him back slightly. He clicked his tongue. “So it rejects interference… interesting.”

Another roar echoed across the battlefield. This time, a larger creature emerged—towering over the others, its body covered in fractured armor-like scales glowing faintly with crimson light. The moment it landed, the ground split beneath its weight. Even Shion paused, her grin fading into seriousness.

“That one’s strong,” she muttered.

Rimuru stepped forward. “Leave it to me.”

But before he could move, the creature lunged—faster than expected. Rimuru barely managed to dodge, the impact sending shockwaves through the ground behind him. The fight shifted instantly into full chaos. Benimaru and Shion coordinated attacks, striking the creature from both sides, but it adapted quickly, its body healing and reshaping as if learning from each blow.

Rimuru realized something unsettling: these beings weren’t just invading—they were evolving mid-battle.

“Everyone fall back for a moment!” Rimuru shouted. “Don’t let it read your patterns!”

Gobta, already overwhelmed, retreated just in time as Ranga pulled him away from danger. Rimuru focused, his mind racing. If brute force wasn’t enough, then he would need precision. He dashed forward again, this time targeting the creature’s movement rather than its body. With a sudden feint, he lured it into striking the ground, then compressed a massive burst of magical force directly beneath it.

The explosion sent the creature airborne, and before it could recover, Benimaru unleashed a flaming arc that engulfed it completely. Shion followed with a final crushing strike that drove it into the earth, ending its movement at last. The battlefield briefly fell silent, save for the distant roar of remaining beasts.

But Rimuru did not relax. He looked up again. The crimson cracks were still there.

And they were spreading.

Far beyond Tempest’s borders, faint silhouettes could be seen forming in the sky—larger openings, wider than before, as if what they had faced so far was only the beginning. Rimuru’s expression darkened slightly as he spoke, almost to himself.

“This isn’t an attack… it’s a warning.”

Benimaru approached him. “Then what do we do?”

Rimuru looked at the sky one more time, then turned toward his city—toward the people who trusted him.

“Then we prepare,” he said quietly. “Because whatever is coming next… it’s not going to stop at the outskirts.”

Behind them, the wind howled through the broken sky, carrying the promise that this was only the first day of something far larger than Tempest had ever faced before.