With Oshiro finally tamed by Deo, the Reaper left to fade away with the rest of Tawano's dark past, the city is safe once more. Tokyo, on the other hand, is on the brink of collapsing.
When Rikuto's call for help ends with Oshiro shot by a panicked teenager, Kazuo decides to step in. Making use of Oshiro and Tomo's knowledge of the city, he sends them back home- along with Deo and Kanda, who are sent with the objective of bringing Tokyo into the fold.
The idea is simple; by spreading Kazuo's influence to Tokyo, they're going to save it from collapsing into chaos. The follow through is anything but, when the alliance between Tawano and Tokyo turns out to be far more fragile than they thought, just in time for them to learn the serial killer who started it all is more than just an idle threat- together, those two unexpected facts might spell the end of everything Kazuo has been working so hard to build.