Kagurazaka Gakuen High School's Mechanical Engineering Department (Kikobu) used to be a prestigious robot development company. However, the school has lost its past glory and has become an obscure school. However, when new first-year student Itsuki Kanae joins the club, the members are gradually united, inspired by Kanae, who is always positive, and Naoki Megata, who builds the robot "Action" on her own.

After many twists and turns, the mechanical engineering club competed in the robot competition "Nisocon", where prestigious schools from all over the country gather. Through the 1st and 2nd rounds, they advance to the semi-finals. However, due to the battle with the powerful school, Action's damage is enormous. Moreover, the next opponent is Shiroganedai Gakuin, a prestigious mechanical engineering school that won the previous tournament. Kagurazaka's defeat is obvious to everyone, but the machine department will not give up on their dreams and challenge the match. The story ends with the start of the semi-final match. + More