In the far future, a species known as Erinacenomorph have attained humanoid forms. Their perceptions have been influenced by things they've seen. This here creature was invented by a brilliant mind, named Jin. Jin gave this creature its own distinct natures, she named it Chance. Jin was the first ever to create a unique creature.
In this world, every person is chosen by a spirit animal, the main form of deity in this world. Once found, the person can form a bond with these spirits, and maybe even form a contract.
That was just considered a myth, but Fang Bloodborne believes otherwise, and he's not alone. Eventually, he's called by his spirit, and chases after them, only to find someone he didn't expect to see.