Streaming platform WATCHA has released the main trailer for its original K-Pop idol documentary, 'Fill In The Blank'.

Starring Oh My Girl's Hyojung, The Boyz's Q, ATEEZ's Wooyoung, and LE SSERAFIM's Kim Chaewon, 'Fill In The Blank' begins with an interesting experiment. The main trailer begins with a narrator who reveals, "It's believed that the life of a modern citizen of this society, which has witnessed extreme materialization, can always be explained with 9 objects under any condition. Is this true, or false?".

Four musicians have been selected to participate in this experiment, coincidentally four K-Pop idol stars who live very different lives on and off the stage or in front of the camera. Through the experiment, these four K-Pop stars also embark on a journey of introspection, as they reflect on how they've dealt with their different lives on/off the camera. 

To find out more about the above experiment, and the lives of these four K-Pop idols through objects, stories, reflections, and more, catch the WATCHA-original documentary 'Fill In The Blank' on January 3.