Hazbin Hotel/Helluva Boss, World War 3, male human OC x female harem

The year is 2030 in the 21th century. The earth is full of life billions humans live on the earth, this world is ruled by Two Alliances, the Allied Nations, and the Imperium Axis. This world's path diverges from the real world to one where the Earth despite its prosperity, is on the brink of a third World War.
The world is creeping toward the edge of a massive conventional global war the likes that has not been seen since the first and second world wars, and after centuries of building alliances and more then a hundred years of two factions their can only be one in this struggle to decide who shall lead and guide the future of mankind the Allies or the Imperium.
Beyond earth, God the creator of all life and the universe has seeming vanished from heaven, in hell Lilith she too has vanished. No one knows where they both have gone.
Among all of this, a young man name O'Brien Everchoosen is living the American dream in Hope County Montana enjoying the semi peace in the land of the free and home of the brave before he is called to duty to fight in defense of United States of America and all those he cares for.