So, to give you a of the original film (which the behind-the-scenes footage documents):
For those unfamiliar with the series, Hagure.Idol.Jigoku-hen, also known as "Hagure Idol: Hell's Other Side," is a Japanese anime series based on the manga of the same name. The story revolves around the life of a young idol named Yuri Shibuya, who appears to have it all – fame, fortune, and a devoted fanbase. However, beneath the surface, Yuri's life is far from perfect. As she navigates the cutthroat world of idol politics and fame, she must also contend with a host of supernatural forces that threaten her very existence. Hagure.Idol.Jigoku-hen.2020.1080p.10bit.WEB-DL....