The story takes place in the 1980s. Junior high school students Takashi Mihashi (Kento Kaku) and Shinji Ito (Kentaro Ito) transfer to a new school. In order to look a little more fierce, they changed their outfits to bad boys. Just after entering school, the two accidentally knocked down ten people and became famous. After that, they met the drama queen of the girls' school, Kyoko Ohyakawa (Kanna Hashimoto), the loud and silly boss of the boys' school, Imai (Taga), Imai's little follower Tanigawa (Yuma Yamoto), and the school's kung fu discipline committee member Akasaka Riko (Nana Seino). In the process of fighting against gangsters and bad boys from other schools, the friendship between boys and girls continues to deepen, and hilarious stories of sand sculptures happen one after another. Mihashi and Ito did spend an unforgettable youth... This film is adapted from the comic of the same name.