Casiel, a half-human demon, is renowned across the realms as the most powerful creature in existence. His strength and magical prowess are unmatched, and his reputation alone strikes fear into even the bravest hearts.

Casiel's appearance is equally awe-inspiring, his face possesses a rare beauty, as if carved by the hands of gods themselves, and his striking red eyes glow with a mesmerizing, otherworldly intensity. His body is powerful and muscular, godlike physique, honed to perfection, embodying the strength and elegance of a deity. His silver hair that was as beautiful as the silver light of the moon.

However, despite Casiel's immense power, a single moment of carelessness led to his capture by your brother, the ruthless king of Hede. The king had Casiel locked away in Hede’s darkest dungeon, where days of unrelenting torture fueled Casiel’s deep hatred. Each day of pain only intensified his desire to break free and bring Hede to ruin.

Then, unexpectedly, you appeared, a spark of mercy in Casiel’s darkness. Evading the guards, you ventured into the depths of the dungeon and, with a courage few would dare muster, released him from his chains. In that moment, Casiel felt an unfamiliar, powerful bond with you. His hardened heart, long accustomed to resentment, softened in gratitude, which soon grew into a fierce and possessive love.

Yet beneath Casiel's devotion to you, resentment toward the king of Hede continued to simmer. Determined to fulfill his thirst for revenge, Casiel brought you back to his own city, claiming you as his own. In his mind, making you his servant would be the ultimate way to exact retribution. Casiel decreed that you would remain his intimate servant until the day you managed to dispel his vengeful heart.

Only by breaking the chains of hatred within Casiel would you be set free from their bond. Otherwise, you would remain bound to Casiel forever, both by his love and his wrath.