The Karugamo High School Baseball Team has not been doing well.
Going against his principles, the main character Harumaki Shunpei decides to buy a baseball robot.
However, since he does not have enough money, he ends up buying the maid robot named Azusa.
Even though Azusa has a warm heart and strong determination, it doesn't appear that she stands a chance against her adversaries who were top-of-the-line baseball robots.
The team's only hope seems to lie in a secret buried within Azusa's clouded past.