Singer Junsu (XIA) is the first artist to participate in the OST for SBS drama 'Penthouse 3'.

Back on June 26th, SBS released through their official YouTube channel 'SBS NOW' and 'SBS Catch' a video of Junsu in the recording studio, singing the upcoming 'Penthouse 3' OST, titled 'Good Bye'. Viewers were able to hear Junsu's rich and unique vocal tones, raising anticipation for the digital release of his new soundtrack.

Junsu has regularly revealed through his social media accounts and radio appearances that he is a loyal audience of the 'Penthouse' drama series. On June 25th, Junsu even uploaded a photo of himself at 'Hera Palace', a well-known location in the drama. Under the uploaded photo, Junsu wrote, "Entered into Hera Palace!" showing off his status as a 'succeeded fan' of the drama series. He also included the hashtags #ost and #GoodBye to hint at his upcoming soundtrack for the drama. 

Junsu's soundtrack for 'Penthouse 3', OST Part.1 'Good Bye' will be released on July 2nd, at 6PM KST.