In the Kansai region, there are two schools located in the Hyogo and Osaka prefectures. One, Takizakura Girls' Academy in Osaka, was successfully branded through the success of the entertainment course selection idol club, while the other, Tsubakisakuhana Girls' High School in Hyogo, is an old-fashioned preparatory school. When two girls, who are daughters of the presidents of these two opposing schools, meet through idol activities, a big change is born in the small world that surrounds them. Searching for something more important than an already important promise... "The story of a School Idol Project that everyone makes come true" begins upon a brand-new stage. School Idols, let's start now!!

This is the 2019 summer movie for Kishiryu Sentai Ryusoulger. It is twin-billed with the summer movie for Kamen Rider Zi-Oi: Kamen Rider Zi-O: Over Quartzer!. It will feature the debut of Ryusoul Gattai Kishiryuzin.