Supreme Demon Lord

JD goes through the motions of every day life, wishing that he could make his nerdy dreams become reality. One night as he goes to sleep, he finds himself in what he believes is just a normal dream, but soon realizes that he can't wake up to his reality. The thing that shocks him the most after this revelation, is that he's taken the form of a small demon named Rokene. After realizing that this new reality has become his own, he also finds that he has a system similar to that of what you find in video games, and it begins to explain to him that his objective in this new world is to become the god of not only the demon race, but of every existence in this world.