She is known for her writing of the popular Korean television dramas Dream High (2011), I Can Hear Your Voice (2013), Pinocchio (2014-2015), While You Were Sleeping (2017), and Start-Up (2020).
[11] The relationship between writer Park Hye-ryeon and Lee Jong-seok was established during drama SBS' 'I Can Hear Your Voice' in 2013.
In this series, Park Hye-ryun blended fantasy and courtroom drama to create a story revolving around a boy with mind-reading abilities and a lawyer.
[12] She was praised for the flawless story development, tight dialogue and setting, and surprising twists and turns in each episode.
In November 2016, iHQ announced that Park Hye-ryun would be making her comeback with the drama 'While You Were Sleeping' (working title), and Lee Jong-seok's casting was confirmed for the project.