Human Natural Enemy summary: Once feared as the most lethal killer known as Blade Rabbit, he now lives a quiet life under the name Goya, a humble chef. But peace doesn’t last. One day, a mysterious girl named Jin Seonu walks into his restaurant— carrying an indescribable, intoxicating scent that awakens his long-dormant instincts. Drawn by that same scent, former comrades and killers—his Natural Enemies—begin to appear, each with their own mission and hunger. As predators close in and past lives collide, Goya finds himself torn between the instinct to protect… and the desire to possess. What lies at the end of this bloodstained feast of obsession?