Heaven's Grief Brings Hell's Rain
Taehyung is a powerful Incubus who, like others of his kind, is eager to dominate and feed on humans' sexual desire. His only purpose as a sex Demon is to seduce and encourage those same humans into sin.
Like all jobs, his comes with rules, the most important one being that Incubi are not to submit to any being, be it a mortal or immortal one, for it goes against their whole existence.
Although curious and tempted to break that rule after new submissive feelings are awakened within him, Taehyung is a loyal follower who manages to keep himself in check, for the most part.
But, after meeting Jeongguk, a recently banished Fallen Angel, he can't help but want to give into his deepest desires, something that ends up putting his own life at risk.