PrabatSubba

Kazuki was a loner, an ordinary young man who lived in the shadow of the world, always unnoticed and disconnected from those around him. Life passed him by in the mundane, without excitement or companionship, until a mysterious force pulled him into a new world—a sprawling ancient fantasy realm teeming with magic, supernatural forces, and powerful beings beyond imagination.

At first, Kazuki was full of hope, thinking he’d finally been given the opportunity for something greater. However, this new world was no paradise. Betrayed by those he trusted, abandoned to die in a brutal struggle for survival, Kazuki faced his darkest moment... but death wasn’t the end.

Reborn with a new awareness, Kazuki returned to life in this strange world, stronger and wiser than before. No longer the passive, trusting soul he once was, he has now become something much more dangerous—a man with a new resolve and a thirst for power. His once-lonely existence is filled with purpose, and now he walks a darker path. Vengeance burns in his heart as he begins his quest to discover the truth behind his betrayal and the mysteries of this world.

Kazuki is not alone in this journey. By his side is Seraphina, a cunning and ruthless slime with the ability to shift between forms. Her cute and playful nature hides her true potential in battle—where she’s ruthless and terrifying, able to absorb, copy, and steal the abilities of those she faces, making her an indispensable companion. Together, they form a dangerous duo, each feeding off the other's hunger for power.

The world Kazuki now inhabits is unlike any he’s ever known. This ancient realm is divided into multiple regions, each filled with unique magic, supernatural beings, and towering cities lost to time. From towering wizards who command the elements, to warriors blessed by the gods, and strange creatures of myth that lurk in forgotten lands, this world is a place where the strong survive, and the weak perish. Magic and superpowers flow through the veins of the land, shaping the lives of its inhabitants. Ancient mysteries lie hidden within the ruins of lost civilizations, where powerful relics and long-forgotten spells await those bold enough to uncover them.

But Kazuki soon learns that he is not the only one who has been summoned to this realm. Other powerful individuals from various worlds—be they summoned heroes, legendary warriors, or gods cast down from their celestial thrones—are brought here either by fate, chance, or force. Some arrive with dreams of conquest, while others merely seek a way home. These Isekai-ed warriors hold powers that could shatter the very fabric of reality, and Kazuki will face them in battles for survival, alliances, and dominance.

As Kazuki delves deeper into this strange and brutal world, he discovers an unknown power lying dormant within him—an ability that no one, not even the gods of this world, fully understands. With each battle, his strength grows, and the dark potential within him starts to awaken, making him a force to be reckoned with. He and Seraphina are drawn into a web of interdimensional conflicts, where beings from other worlds clash for control, power, or simply survival. Kazuki’s rebirth grants him not only a second chance but a path to becoming something far greater—perhaps even the one who could reshape this world, or destroy it.

With new companions, formidable foes, and hidden powers, Kazuki must navigate a dangerous world filled with supernatural forces, treacherous alliances, and ancient secrets. Will he rise to become the master of his destiny, or will he fall once again, betrayed by those who seek to control his newfound power? In this world of magic, gods, and monsters, only the strongest will survive—and Kazuki is determined to claim his place among them.

Table of Rebirth of the Ruthless

Table of contents

Volume 1