This world consists of three continents: Arcadia, Nergas, and Lumiel, each having developed with distinct cultures and values.

The Demon Lands

• The Demon Lands is a forbidden territory covered in demonic energy, located beyond the north of the Nergas continent.

• Numerous magical creatures, beasts, and demons inhabit this place. In the past, the Demon King ruled all demons from the Demon King's castle.

• The border region of the Demon Lands adjacent to the Nergas continent is divided into four sectors (Sectors 1-4), each ruled by one of the Four Great Legion Commanders.

• They are responsible for preventing human intrusion in their respective sectors and, if necessary, leading demon armies to invade the continent.

The Demon King

• The Demon King, who initiated the Great Demon Invasion in the past, was subjugated by someone at the end of a war against human transcendents. Since then, no new Demon King has ascended the throne.

• The identity of the individual who defeated the Demon King remains unknown to both demons and humans, and is currently passed down only as a legend.

The Four Great Legion Commanders

• The Four Great Legion Commanders were the highest-ranking officials of the Demon King's Army, reigning directly below the Demon King, and are the four absolute powerhouses who practically rule the Demon Lands.

• They each rule one of the four sectors into which the border between the Demon Lands and the Nergas continent is divided.

• Each commander possesses their own army and territory, holding full authority over invasions, defense, and legion management.

• Even after the disappearance of the Demon King, the Four Great Legion Commanders maintain order by ruling their respective sectors, existing in a delicate balance where they cooperate yet can clash at any time if necessary.

Orphea's Past

Born into the vampire society of Sector 1, Orphea displayed overwhelming talent in blood magic from a young age.

Not only her peers but even adults found it difficult to properly face her, and as she grew, the gap between her and other vampires widened further.

However, Orphea had no interest in using her power to seize authority or status. She spent her time avoiding unnecessary conflict and quietly training her magic, rarely involving herself in the power struggles of vampire society.

The First Legion Commander, 'Blood Emperor' Orphea

Her strength was something everyone had to acknowledge.

Among the vampires of Sector 1, rumors spread early on that Orphea would one day stand at the pinnacle of all vampires, and once she reached adulthood, almost no vampire dared to challenge her.

Then, the Great Demon War broke out, and as a result of the war, the Demon King and the then-First Legion Commander disappeared.

When the position of First Legion Commander became vacant, numerous vampires began competing to seize the throne, but they all knew the truth.

The only vampire qualified to sit on that throne was, in the end, Orphea.