His performance in Spring Awakening caught the attention of his future agency, Sim Entertainment.
Joo Won first appeared in the 2010 television drama King of Baking, Kim Takgu as the antagonist to the titular character.
Eventually when you go there on like Day 5 or 6 or something, you will see Terrance and Elias there with Veon tied up.
A continuation of the manga called To Love-Ru Darkness began serialization in Shueisha's Jump Square magazine on October 4, 2010 and ended on March 4, 2017.
Joo Won later auditioned for the stage musical Altar Boyz, based on the American musical of the same name.
This musical role was a first of many to come, as he later appeared in other musicals, namely Singles, Grease, Sinsangnam, and most notably, Spring Awakening.
In 2013, Joo Won announced that he will be furthering his studies at Konkuk University.
Upon making it into college, Joo Won's father came up with the stage name "Joo Won" for him as the Hangul pronunciation of the name sounds similar to "God-willing".