System of The Lord of Darkness

Rayan was just an ordinary high school graduate, exhausted by the endless fights within his family. He never imagined how tragically his life would change—until he and his entire family were thrown into another world. A world ruled by monstrous creatures, strange civilizations, and laws where only the strong survive. In this cruel new reality, power is everything—but for Rayan, finding his family is the only thing that matters. In desperation, he forms a contract with a mysterious, otherworldly man. But the deal was more than just a promise of strength… It was a cursed path in disguise. Without realizing it, Rayan becomes the bearer of the Mark of the Lord of Darkness. Now, he has no choice: To survive, he must grow stronger. To protect his family, he must be ready to stand against the entire world.