Humans, Elves, Dwarves, Orcs, Demons, and the Demon King coexist in a realm where elemental warriors dominate battlefields, shadow-bending assassins strike from darkness, and reality-warping mages reshape existence itself. Yet one orphaned boy from the gritty slums of Arcanum Nexus awakens something different—[Muscle Genesis], an ability to build and command raw physical strength. No weapon resonance, no magical channels, no dazzling arts. Just pure, unflinching power. Starving and abandoned by the system, Kairo Vale claws toward survival with singular purpose. When the prestigious Nexus Academy Entrance Tournament offers his escape route, society dismisses him instantly—another Unranked nobody wielding what seems worthless. What they don't understand: muscles don't stay static. They expand. They strengthen. They push boundaries. Endurance multiplies alongside his gains. Willpower hardens through suffering. The relentless climb begins. Forced through brutal trials, betrayed by aristocratic teammates, and targeted by entities dreading his ascension, Kairo advances through exhausting repetition—grinding through each barrier with methodical ferocity. In this world, strength determines hierarchy. He'll construct his dominion through sheer physical mastery. Unwelcome in their established order, he'll forge his own path with iron fists and unstoppable determination.