Leo_Marinus

Plot Summary:

In a vast world divided by supernatural forces, three kingdoms have thrived for centuries, each sealed off from the others by ancient laws created by a cosmic entity. The Nation of Humans, ruled by the wise but formidable King Lucus, has remained isolated for more than two hundred years. Meanwhile, the Nation of Vampires, led by the enigmatic and ruthless Lord Valentine, has stood untouched for over three centuries. And in a dimension between realms lies the Nether World, home to the demonic Nation of Demons, commanded by the fearsome Demon King Vulcan. Each kingdom is bound by a strict decree: no contact or passage between worlds. Only the gods and ancient forces know why these realms are held apart.

But beneath the surface, there is a looming tension: the prophecy of a Great War of Blood, a cataclysmic battle for the power of the God of Justice, meant to restore balance between nations. This war, which erupts every 2,000 years, grants control over the forces of the universe: fire, water, thunder, dark energy, nature, and more.

Main Character:

The story follows Leo de Grace, a young man born in the Human Nation with no magic—a rarity in a world where nearly everyone possesses mystical abilities. After being abandoned by his parents, Leo was raised by his caring aunt, Luna de Grace, a member of a prestigious family. Though lacking in magic, Leo displays extraordinary intellect and physical strength, making him unique among his peers and earning him great respect despite his differences.

When Leo reaches the age to attend the prestigious Lucus University of Knowledge, his life takes an unexpected turn. A mysterious incident disrupts the Freshers’ Ceremony, leading him to become the first human ever to attend the Vampire University in Lord Valentine’s kingdom.

The Vampire Nation and the Mystery:

In the Vampire Nation, Leo must confront his own limits, learning to survive in a society far different from his own. Here, he encounters powerful beings, including mysterious vampires who are wary of his presence. Though he lacks magic, Leo’s resilience, intelligence, and unexpected physical prowess attract both respect and suspicion. The Vampire Nation is steeped in lore and mystery, and Leo finds himself drawn to ancient stories of the God of Justice, the entity whose power could potentially end or ignite another Great War of Blood.

The War for Justice’s Power:

As the days pass, rumors of the Great War grow stronger. Tensions between humans, vampires, and demons increase as each kingdom learns of the approaching battle for the power to claim Justice’s gifts. While Leo grapples with his place in a world divided by magic and bloodlines, he discovers a hidden destiny that intertwines with the upcoming war.

Leo's Journey and the Call of Destiny:

Through trials of strength, wisdom, and courage, Leo must navigate through the politics of the Vampire Nation and form alliances with vampires, humans, and possibly demons. As he grows, he uncovers hidden potential within himself, a power he never knew existed. This power could be the key to uniting the three realms or might trigger the Great War of Blood.

Themes and Key Elements:

Divided Kingdoms: The tension and isolation between humans, vampires, and demons, mirroring real-world divisions.

Power and Balance: The search for the God of Justice’s power, representing the quest for balance among all forces.

War and Unity: The potential of the Great War of Blood to either tear apart or unite these realms, and the sacrifices necessary for peace.

Self-Discovery: Leo’s journey to find strength within himself, beyond magical power, and his quest to determine his place in a world that sees him as an outcast.


Leo’s fate is intertwined with that of all three nations, and as he stands on the brink of the Great War of Blood, he must decide not only what kind of man he will become, but what kind of world he wants to create.

Table of Great War On Valentine Land

Table of contents

Volume 1