Shen Ni is the lowest-ranking "F-class Gatekeeper" in a crossover trial realm. Loyal and kind by nature, he saves Nezuko in the Demon Slayer world when fate is pushing her into an abyss. The System deems his mission a failure, and his teammates cast him out. His malicious rival, Liu Xuan, seizes the chance to alter his fate and brand him a harbinger of disaster. At his most desperate, Shen Ni awakens his golden finger, the "Bond Contract": any crossover character he sincerely saves can share their abilities with him and have their fate corrected. From the Demon Slayer world to the Jujutsu world, he endures humiliation and bears the blame, hunted by fate as he saves one person after another who was supposed to disappear. The kinder he is, the more fate sees him as a virus; the more loyal he is, the closer he comes to the truth behind the myriad worlds. When the "Council of Fate" behind Liu Xuan issues an order to surround and kill him, Shen Ni reveals his final trump card: the true enemy he has been fighting was never a single rival, but the predetermined endings of every world. Fate calls him a dog, so he'll bite straight through fate.
