The "Idols" don't only sing, they use magic too. Do you believe in Idols?
In this parallel world, the Idols here are not just your run-off-the-mill singing idols, they use magic as well! By gathering from the emotions of the crowd during their live shows which are called "Orchestra", they use their magic to defeat magical beasts who terrorize the regular humans.
Follow the story of the unit "LiGHTs", comprised of 5 students in Flora Girls High School, and their fellow rival units in the same school!