Unknown Hero: Endless Light

The Great Catastrophe occurred when demons from hell emerged and brought terror and despair to humanity. They slaughtered half the population of the world, causing humanity to fall into despair. Hope emerged when a few humans awakened superpowers to resist the wicked demons. The most powerful of these was a human named Victor Lore, who awakened the Power of Light. He almost brought the demons to their knees, but another human named Nero awakened the power of Darkness and aided the demons in terrorizing humanity. Victor and Nero fought and both ultimately perished, leaving the other awakened humans unable to resist the demons. Humanity slowly lost hope until a countless number of swords of Light descended and eliminated the demons completely. The humans believed it was a grace from God, but they didn't know that it was a teenager who had awakened the Power of Endless Light who had actually saved them.