Natsuki Critical Moment!. A new teacher named Jonouchi has been assigned to Chihaya's class. He was a customer who came to Chihaya's mom's coffee shop the other day, and he was an acquaintance of Chihaya's. At that time, the members of the Robot Study Group were excited to prepare for the student robot wrestling contest at school. The members who are desperate to win the championship are running robots in the school without worrying about the inconvenience of the students around them. A robot going haywire at school has entered Chihaya's locker room and others...