A high school student who loves Metal Gear Solid is sent to a desolate land where light has returned to revive Alefgard, which has been devastated by the hero's betrayal. He was surprised by the sudden start of life in another world, but he decided to restore the desolate world together with people from all over the world. You will also meet the heroes of the Dark Cause, and you will learn why you betrayed humanity.
