Translator specifies that this isn't about Burning Sun specifically, but it's a helpful statement to understand some of the context and moving parts of this scandal, which will hopefully incriminate more participants in the nightlife industry.
In 2016 Jo Wonkyu went undercover to research for his novel “Made in Gangna,” as a call girl carpool (service that would drive drop off girls to night establishments and/or locations they would meet clients) driver for 6 months. He stated that the Burning Sun situation was just the tip of the iceburg.
“20 something year old pimps would place underage girls into clubs and make them drink GHB. Then they would approach rich men and make them pay to have sex with the girls that they would say were of age. There were many cases where they would illegally film the sex and then blackmail the guy. There is one street in Gangnam that is all officetels that have paid for sex happening. Amongst call girls that prostitute, there are even elementary school girls. The clubs all have a network of contact but are separated so that if they are caught they can cut them out easily. There are also quite a lot of different technology that allows for videos and evidence to be wiped. As Gangnam clubs became a big business there are many instance where idol celebrities become shareholders of important clubs. Idol members of group S are shareholders and many artists from management company Y are also shareholders.”
Translated by u/801126 on r/kpop (they've gone through 10 mega-threads so far )