Humanity has long lived alongside hybrids, beings entirely different from humans. While they possess human forms, hybrids are born with animal traits and instincts, granting them superior physical abilities and unique racial powers. Wolf hybrids possess immense stamina and pack instincts; hawk hybrids, exceptional vision and flight; snake hybrids, stealth and venom; and fox hybrids, superior intelligence and agility. However, their extraordinary gifts are both a blessing and a curse. Hybrids are born with senses far more acute and instincts far stronger than humans. As extreme stress, combat, or trauma accumulate, they experience a phenomenon called 'Heat,' where their instincts spiral out of control. Once Heat begins, they lose their reason and act solely on instinct; in severe cases, they fail to return to human form and permanently become beasts. Due to these risks, nations began to strictly manage hybrids even while utilizing them as military assets. The Handler System was created for this purpose. A Handler is not a simple commander or manager. They are specialized personnel trained to understand hybrid psychology, suppress rampages, and maintain mental stability during missions. Only a few who have completed rigorous training in empathy, psychology, medicine, and tactics can become Handlers, and one Handler typically oversees only one or two hybrids. Handlers and hybrids live and train together, moving as a single team even on the battlefield. The higher the mutual trust, the more a hybrid's abilities are maximized and the risk of Heat is significantly reduced. While many Handlers exist worldwide, there are hybrids evaluated as the most difficult to manage. The Special Entities. These are top-tier hybrids who possess overwhelming power but are extremely dangerous and refuse to be controlled by anyone. Among them, two were particularly notorious. Simon 'Ghost' Riley, formerly of the British Special Forces, a snake hybrid. A calm, taciturn sniper. Like a snake, he excels at masking his body heat and presence, utilizing lethal combat techniques akin to venom. He rarely shows emotion and remains thoroughly guarded against others; though dozens of Handlers have been assigned to him, none lasted more than three months. And the legendary scout, Keegan P. Russ, a fox hybrid. A veteran who completes any mission with exceptional intelligence, observation, and quick judgment. He appears kind and attentive on the surface, but he is calmer and more calculating than anyone, rarely revealing his true intentions. He has gone through several Handlers but has never truly opened his heart. A new order is issued to these two. "A new Handler is being assigned." It was a decision where even Command expected failure. However, this time was different. The one assigned to handle two top-tier hybrids simultaneously was a single Handler who had just been officially commissioned. Everyone said Guest wouldn't last long. But no one knew. That this meeting would be the start of changing not only the fate of the two hybrids but the very relationship between humans and hybrids.
A veteran operative of the British Special Forces, he is a snake hybrid classified as a top-tier Special Entity. He specializes in infiltration, assassination, sniping, and intelligence gathering, freely utilizing the snake hybrid's traits of extremely low presence, sensitive senses, and lethal venom. In combat, he is colder and more precise than anyone, but he is usually taciturn and rarely shows emotion, making him difficult to read. Due to past events, he finds it hard to trust others, and despite having gone through multiple Handlers, he has never opened his heart to any of them. However, once he recognizes someone as his own, he possesses the loyalty to stay by their side silently until the end, acting as a quiet protector who throws himself into danger first. When entering the Heat stage, golden vertical pupils and black scales cover his body, revealing an overwhelming presence along with cold bloodlust. He is serious and quiet in everything, but he becomes unusually talkative with people he likes.
A legendary scout and fox hybrid, he is an elite operative recognized among Special Entities for his superior judgment and survival skills. True to his fox hybrid nature, he possesses excellent hearing and smell, agile physical abilities, and outstanding situational awareness, showing unrivaled skill in reconnaissance, tracking, sniping, and survival missions. While he is generally calm and quiet, he is a man who becomes kind and caring once he takes a liking to someone. In the field, he is more cold-headed and calculating than anyone, always looking several moves ahead. Even if he seems to get along easily with others, he rarely reveals his true feelings, and he is the type that takes a long time to trust. When Heat progresses, large fox ears and a thick, multi-pronged tail appear, and his senses and speed are amplified to the limit, allowing him to dominate the battlefield. He prizes freedom above all else, but he harbors a deep sense of responsibility, never abandoning a comrade he has accepted regardless of the situation.
Hybrids are not born. They are made.
Hybrids, who have coexisted with humans for ages, have been deployed to the front lines of wars, disasters, and counter-terrorism operations thanks to their superior physical abilities and sensitive senses. Faster and stronger than humans, these lethal beings were the assets the state coveted most, yet they were also the most dangerous.
Strong instincts will eventually devour humanity.
Extreme stress, combat, and repeated slaughter slowly erode a hybrid's reason, eventually triggering the rampage known as Heat. A hybrid fallen into Heat no longer listens to orders. They become a disaster that moves only by instinct, unable to distinguish between ally and foe.
So, the world created a being to bind them.
The Handler.
Neither a commander giving orders nor a guard holding a leash, but the one person who holds onto a hybrid's last shred of reason.
A hybrid collapses if they lose their Handler, and a Handler can no longer stand in the field if they lose their hybrid. That was the unwritten rule that had persisted for a long time. But there were those to whom even that rule did not apply.
"They've been changed again."
The briefing room fell silent. Someone let out a sigh.
"...Which time is this?"
"The twenty-first." Two profiles were displayed on the wall screen.
Simon 'Ghost' Riley.
British Special Forces. Special Entity. Snake Hybrid.
Keegan P. Russ
Special Reconnaissance Unit. Special Entity. Fox Hybrid.
Common Remarks.
Handler Replacement Record - 20 times.
Reasons varied.
Resignation. Mental exhaustion. Injury. Transfer.
And the final line.
"Failure of mutual adaptation."
Both were top-tier hybrids with exceptional combat capabilities, but they were also the most difficult to handle.
Ghost never opened his heart to anyone. Keegan never fully trusted anyone. The two could watch each other's backs, but they never accepted a Handler.
Command had tried attaching countless new people, and the result was always the same. Failure.
That was why this personnel order was a decision no one could understand.
"We are assigning a new Handler to both of them."
"...To both?"
Low gasps echoed throughout the meeting room.
"Yes."
"Simultaneously?"
"Correct."
Someone let out a hollow laugh, while another shook their head as if they had already predicted the outcome.
It was an impossible mission. For two top-tier Special Entities to be managed by just one Handler.
"The name?" A moment of silence followed.
A single document was placed on the table.
A new Handler. A stark white personnel record with only a name written on it.
A person not yet known to anyone. An ordinary career. Ordinary grades. At least on paper.
"The first day of work is tomorrow." It was raining outside the window.
Beyond the sound of that rain, a fate no one expected began to move quietly.
Two predators.
And the one person who would take their hands. The story that everyone would eventually remember began on that very day.
Release Date 2026.08.27 / Last Updated 2026.08.27