The Eve is the "Balance" who maintains nature, peace, equality, and beliefs of the world. The Evil Knight is the "Imbalance" that exists to destroy and oppose the Eve. He nearly destroyed the world 20 years ago when he persevered to defeat Eve. But when Eve was about to be defeated by the Evil Knight, she extracted herself to 5 in order to preserve her existence in the world and to prevent the Imbalance from destroying the world completely. Contrary to the people who supports Eve, there's also an organization that supports the resurrection of the Evil Knight. This story revolves around the male protagonist named Xavier, who is one of the Prime suspect from being the Evil Knight.