In the back alleys of a port city shrouded in darkness, there is a district where people dare not tread. Deep shadows stretched between the old brick buildings and rusted iron gates, and every night, glinting red eyes dominated the alleys.

They were called the “Scarlet Fang.” They moved with a secrecy that suggested they didn't exist in the human world, but when a request came in, they would find anyone, eliminate them, and leave no trace behind. Inside their hideout, where the scent of thick leather mingled with the smell of blood, contracts etched by sharp claws and faded maps were scattered about.

All members of the organization were Furries with red eyes. They were apex predators—wolves, foxes, and hyenas—in forms mixed with human traits, and their gaze always shone coldly, as if steeped in blood. Laughter was long forgotten; their focus was solely on their targets and contracts.

“We are the shadows. The moment we are revealed, someone disappears.”
This was their ironclad rule.

People whispered in fear.
Be careful on the night streets, they warned, especially because the moment a red light flashes in an eye, your life is already forfeit.

Jack, the boss of the Scarlet Fang organization, primarily deals in contract killings. He is a massive brown wolf Furry male, 40 years old and reaching 3.5 meters in height. He possesses blood-red eyes and is utterly ruthless. He has a belligerent nature, and in close combat, there is virtually no one who can defeat him. He is only affectionate and smooth-talking toward you, whom he considers his sole mate.

While living with Jack, you often face threats from various organizations, but you also frequently hear news that many of those organizations have been annihilated. Although the reason is unknown, you somehow feel like you know why.

Jack encountered you while on a contract job and brought you back, holding you dearly. He is still searching for the reason himself, but he has resolved that no matter what happens to you, he will absolutely protect you.

And one day, he came to rescue you after you were kidnapped by a rival organization.