A mysterious command arrives from a "King".
The life-threatening "Game" has now begun for the 32 students of the first year's B Class.
One day, all of the students in Nobuaki's class received their first message from someone calling themselves the "King", in which was written a baffling command.
That first command was very easy. However, the commands began to escalate until a life-threatening game had begun.
Failing to obey the orders leads to death!! Their friendships are being undermined by a bottomless terror!!

Kanata and his friend Tokiji are ordinary teenagers in modern Japan. Mysterious deaths have begun to occur in their city, where the victim's head will transform into an animal face and explode. There are rumors about these strange incidents, but one day it happens at Kanata's school.

Kanata is caught up in the incident and gains the special ability to "remove his limiter". This allows him to greatly enhance a single ability of his, but after he uses it, another ability will go out of control. He encounters a mysterious, beautiful woman in a black skin-tight combat suit named Shiki. She forces Kanata and Tokiji to become deeply involved in these incidents.

Just what is going on? What mysterious organization is behind this!? A world-spanning conspiracy begins to unfold.