Ochanomizu's younger sister, Ran, is a member of the robotics research club at Tokyo Metropolitan Sanpōji High School. The robotics club is going through a trial and error process before participating in the robot contest. However, creating a humanoid robot is difficult, and the members of the club, except for Ran, feel lost. Then Ochanomizu, an alumnus of the club, comes over and gives advice to the members who are worried that they are slowing Ran down. Finally, the day of the robot contest arrives.