Tadakuni (Masaki Suda), Yoshitake (Shuhei Nomura) and Hideki (Ryo Yoshizawa) are studying at Sanada Kita Boys' School. In their ordinary campus life, the three good friends are joking, talking and laughing, and doing some stupid things that only teenagers do. One day without any signs, Apple (Anri Okamoto), Yanagi (Mizuki Yamamoto) and other girls from East Girls' High School suddenly appeared on the campus of Sanada Kita Boys' School, which immediately caused a sensation among these boys with excess hormones. The following news made the boys even more excited. In the next school festival, the two schools will jointly host it. Compared with the excitement of others, Tadakuni and his friends seem to be indifferent and can't get too interested. Of course, when facing the girl they like, they are still shy and can't hide all kinds of shyness. As the school festival approaches day by day, fun and interesting stories are staged alternately... This film is adapted from the manga of the same name by Yasunobu Yamauchi.