Crown Guilty history begins in 2029 when the "Revelation Virus" spread, and sink Japan into a state of chaos, the period known as "Lost Christmas" (The Lost Christmas). An international organization known as CG (Headquarters) involved applying martial law and restore order to Japan at the expense of their independence.
Ten years later in 2039, Shu Ouma a young 17 year old high school, he meets Yuzuriha Inori, the vocalist of Egoist , while visiting one of his favorite places on the way home. Shu is a big fan of Inori, a singer who has taken the internet world by assault. However, he also discovers the other side of it. He is a member of "Gravediggers", a resistance group which seeks to free Japan from the CG.