Titled 'Why Was Sulli Uncomfortable?', the documentary looks back on the life and career of the late idol star and also interviews some of her closest family and friends, including Sulli's mother, Girls' Generation's Tiffany, and more. The documentary aims to relay the encouraging message the late Sulli wished to deliver during her life and entertainment activities.
The late Sulli first debuted as a child actress in 2005 through SBS drama 'Seodongyo', before promoting as a member of f(x) from 2009-2015. She then transitioned into the career of an actress, before her untimely death back in October of 2019 at 25 years old.