A mysterious messenger appears before Haruna Tokisaka, a high school girl who tends to get in over her head. Claiming to be a “cat-shaped android from the future,” the messenger hands Haruna a strange device. It turns out to be a futuristic weapon called “D’z Gear” one that modern science is incapable of creating…!!? Suddenly, Haruna finds herself caught up in a life-or-death battle!
2014: Akira Natsume seems to almost have a phobia of electrical devices while also being very good at diagnosing them. He resolves to change himself for the better and get a girlfriend like his older brother did. ...But then Akira suddenly dies in an accident. 16 years later a special policewoman and her android partner retrieve and activate a highly advanced AI and superweapon called EX-ARM and put it into full control of their ship as a last resort. Turns out the AI is actually just Akira's brain! *Note: The chapter count is based on the original release, which split chapters 69-98 into multiple parts.*

