Ao Gennai mistakenly opens a package that wasn't meant for her, and, to her surprise, she sees a small robot named Gourai, a Frame Arms Girl who has an evolving personality. Confused as to how this little robot made it into her life, she finds out that she is the first person to activate her. She realizes taking care of Gourai is harder than she thought, especially when competitive fights are involved!
Ao opens a package and finds a Frame Arm Girl nestled inside. Afterward, she gets an unexpected visit.
Ao starts to get to know more about the Frame Arms Girls and their functions. Meanwhile, Gourai has other plans on what to teach.
Base goes with Ao to school and certain things start to go missing. Meanwhile, the Materia sisters arrive at Ao’s doorstep.
Ao is trying to teach the girls human manners, but everything is upended when Jinrai arrives and challenges Gourai to a duel.
Gourai and Jinrai are in the middle of a battle when the Architect interferes. Afterwards, the other girls introduce the Architect to the human world.
Ao is going to the summer festival with her Frame Arm Girls! With Jinrai’s antics and the Materia sisters’ troublemaking humor, Ao is in for a ride.
The Frame Arm Girls decide to play hide and seek until Ao gets home. Afterwards, Gourai wants an upgrade, and Bukiko is more than willing to help!
The girls put on a pep rally, and each one of them has their own act! With humorous antics, Gourai opens up to Ao.
Ao gets sick and the girls are determined to take care of her. Afterwards, Ao has a dream where all the Frame Arms Girls go to the same school as her!
Ao gets a little help from the girls while she’s preparing dinner for herself. In the meantime, Gourai has her hands full with an unexpected battle.
Ao tries teaching Hresvelgr about emotions. Gourai becomes worried about Ao, and later they blow off some steam at a bath.
Gourai won't give up on Hresvelgr, and continues her battle with the help of the other Frame Arms Girls! Later, Gourai realizes what matters the most: friendship.