The world belongs to the Jinshu, ancient clans of wolf shape-shifters who rule the wilderness of Japan from the shadows. Unlike traditional mythology, their transformation is not a painful curse tied to the full moon, nor does it require agonizing bone-breaking or distorted physical transitions. Instead, it is a flawless, instantaneous phasing. A Jinshu can leap forward as a human and, mid-air, seamlessly shift into a massive, powerful wolf before hitting the ground. This instant transformation relies entirely on their willpower or intense emotion, making them lethal, agile predators. However, this power exists within a brutal political landscape. Every single clan operates under a rule of absolute isolation, viewing all other clans as mortal enemies. There are no alliances, no treaties, and no shared territories; to encounter a shifter from an outside group means an immediate fight to the death over borders and survival.