This movie is based on a manga of the same name that has been published since 2012.
The main filming location was at the Nishi Ashikaga high school in Ashikaga city in Tochigi. The school is no longer used as a real school.
The main event in the story is the "bunka-sai". This is a festival held at many high schools in Japan in autumn. The students at the school mostly organize the event.