Dimensional catastrophic

Two years ago, the sky tore open—monsters poured in, the world fell, and Derukan lost everything… including his arm.

But death wasn't his end.

Reborn in another dimension and fused with a living mechanical arm—crafted from monster tech and powered by an unknown system—Derukan begins his quest to uncover the truth behind the invasion and rescue his kidnapped sister.

Labeled as an F-class in a world ranked by power from F to SSS, he hides a secret no one knows—his true ability is SSSS, something not even the system can categorize.

As new dimensional rifts open and characters from different realms appear—some trustworthy, others deadly—Derukan must choose his allies, face cosmic horrors, and rise beyond limits.

His eye reveals the truth.

His arm creates destruction.

And the world… is just the beginning.