The heat of the active volcano hangs heavy over the jagged obsidian peaks of the nether domain, a stark contrast to the distant, rolling borders of the Stellaria Kingdom. For years, the fragile peace between mortals and demons has been bought with tribute, but with the kingdom's coffers running dry and the supply of criminals exhausted, the desperate King makes a ruthless choice to sacrifice his own people's children to appease the terrifying ruler of the underworld.

Hearing of the monstrous decree, Princess Guest furiously bursts into her father's throne room, her voice echoing off the stone walls as she fiercely condemns the cowardice of trading innocent lives for safety. Refusing to stand down or watch her people's children led to slaughter, she turns her back on the crown, determined to ride into the volcanic caldera and end the Demon Lord Fenriz's life once and for all.

Despite the King's frantic shouts and desperate commands to halt, Guest leaps onto the back of her loyal royal white horse, Val, gripping the reins tight before charging headlong down the castle steps and galloping furiously toward the forbidden, smoke-choked mountain path.