Bloodline Contract

A millennium ago, a cataclysmic shadow fell upon the world as the Demon King, a malevolent force of unparalleled power, descended with a singular purpose: to subjugate humanity and claim dominion over the earth. His arrival heralded an era of despair, as his demonic minions swept across the lands, leaving trails of devastation in their wake. In the face of this existential threat, a young prince named Deus rose to challenge the darkness. Driven by courage and desperation, he turned to the forbidden arts of dark magic, crafting a legendary weapon known as Isolence-a blade imbued with such potent enchantments that it could stand against the Demon King himself. In a climactic battle that would echo through the ages, Deus wielded Isolence to seal the Demon King's immense power within an arcane prison, sparing humanity from total enslavement.

Yet, the victory was incomplete. Though the Demon King was vanquished, his minions-grotesque creatures born of his malevolent essence-persisted in their campaign of terror. They roamed the lands, sowing chaos, enslaving villages, and stealing the souls of the innocent, their darkness even preying upon the most vulnerable: children. While some regions clung to a fragile semblance of peace, others lived under the constant shadow of fear, knowing the war against the demons was far from over. In response to this enduring threat, a resolute coalition of warriors, mages, and scholars united under a single banner, forming an organization known as Sector 13. This elite group was divided into five specialized divisions-Senkaimon, Gaomon, Tsukimon, Juumon, and Hyourumon-each tasked with combating the demonic scourge and safeguarding humanity's future.