Brands started dropping actor Lee Sun Gyun and some sponsors even dropped his wife, actress Jeon Hye Jin, following the news that the actor is embroiled in a drug-related investigation.

On October 20th, Lee Sun Gyun's management agency, HODU&U Entertainment, released an official statement acknowledging that Lee Sun Gyun is the person currently under scrutiny in a drug investigation. 

Shortly after this information was made public, SK Telecom moved quickly to drop all of their endorsement materials with Lee Sun Gyun and Jeon Hye Jin from their official YouTube channel. The couple was previously selected to endorse SK Telecom's kid and family-friendly educational service. 

A health supplement brand also moved quickly to drop Lee Sun Gyun from their endorsement materials. This brand selected Lee Sun Gyun as their endorsement model last July, however, now his name has been deleted, and some of their commercials with the actor that are still online have disabled comments. 

Meanwhile, it was revealed that the Drug Crime Investigation Unit of the Incheon Metropolitan Police is currently investigating a total of 8 individuals suspected of using illegal drugs at an adult entertainment establishment in Gangnam.

They include actor Lee Sun Gyun, Hwang Hana, the granddaughter of 'Namyang Dairy' founder Hong Doo Young; and in the most recent developments, former idol trainee Han Seo Hee, who was previously charged with illegal drug use three times, including once in 2016 when she was investigated alongside former Big Bang member T.O.P.

Lee Sun Gyun has individually filed a report against two people for blackmailing him for his illegal drug use.