A package arrives at Ao’s doorstep. She opens the package and found a “Gourai” a.k.a Frame Arms Girl, which is a mini robot with independent movement capabilities. Frame Arms Girl is a newly-developed prototype that is equipped with “Artificial Self”. It’s an advanced AI that provides them personality. Upon being activated by Ao, the Gourai begins to collect emotions and battle data about Ao’s day-to-day life who she doesn’t know anything about Frame Arms Girls.