Disciple of the Three Kings

When mysterious gates suddenly tore open across the globe, unleashing hordes of monsters, humanity was pushed to the very edge of extinction. Salvation arrived not from within, but through the convergence of three distinct realms: Eun, a world of martial arts; Einheart, a domain of magic and knights; and Gehenna, a realm of demons. The superhumans from these dimensions swiftly eradicated the monstrous threat, yet they proved to be far from benevolent saviors. Operating under the ruthless law of the strong, they subjugated Earth’s newly awakened "players." Amid this tyranny, Lee Ro-Woon dedicated himself to forging peace by uniting Earth's players with the otherworldly superhumans. However, his noble ambitions were met with devastating betrayal from both his own comrades and the foreign elites who despised his influence. Stripped of everything he held dear and reduced to a broken shell of his former self, Lee Ro-Woon plummeted into the abyss, ready to surrender entirely. Yet, at the brink of despair, fate intervened. Transported into a sealed dimension as a vessel of chaos, he came face-to-face with three absolute powers. Rising from the ashes of his defeat, Lee Ro-Woon became the sole disciple of the Three Kings, returning to claim ultimate supremacy over all who once sought to destroy him.