Ten years after a devastating outbreak known as the "Lost Christmas" plunges Japan into chaos and under the control of the GHQ, a resistance group called Funeral Parlor seeks to liberate the country.
Their mission involves securing a powerful item called the "Void Genome."
When internet idol Inori Yuzuriha, connected to the Funeral Parlor, is pursued by the GHQ, she encounters Shuu Ouma, an ordinary high school student.
Through unforeseen circumstances, Shuu gains the "Power of the Kings," forcing him to become involved in the conflict between the Funeral Parlor and the GHQ.
Now, Shuu must learn to control his newfound abilities and decide how he will use them in the fight for Japan's freedom.