Vol.1: After years of fighting, Tokyo is now a dark city where humans and demons live in a fragile peace, but when demons start to lose control and go back to their violent ways, a mysterious drug known as "Zone-00" seems to be behind the changes.
 
Vol.2: After sustaining fatal wounds from the mizuchi (Water Deity) Tsukihiko, Shima wakes up in an alternate dimension fully healed by Mayoko. He wants to go back into battle but is told that this is not his to fight. Meanwhile, Senryo takes on Tsukihiko!