Maka is your typical highschool girl, living in Austria. Her Father gets himself in a huge debt, and has to flee. He drops off his daughter at the airport and drives away. Maka has to travel to Japan, to live with her Mother, which she hasn't seen for many years. And thus, the adventures of Maka-Chan begins!

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!