Reincarnated game developer Riku awakens in a world powered by negative emotions. While others get mighty Classes, he is branded a useless Designer type, a creator of glowing trinkets. Cast out by the ruling Ascendancy, he makes a terrifying discovery: this world runs on code.

His useless power is a developer toolkit. He cannot fight spirits like other hunters, so he does what he does best: he scripts horror. He weaponizes fear itself, the one emotion he can consume.

But a dangerous truth emerges: the Ascendancy farms spirits, and his presence threatens their system. Now, he must code a revolution before his power's side effect, erasing his own existence, deletes him for good.