Actor Joo Won has become the voice of song "Don't Know How to Love" for his starring drama '7th Grade Civil Servant's OST!

This is a remake of another song, and Joo Won previously expressed his difficulties with recording, as he said, "The original song [by AshGray] itself is a difficult song, so I had a lot of difficulties, but I tried hard to give a different feel from the original version. With the help of a talented composer, I finished the OST recording successfully."

"Don't Know How to Love" expresses the love that Gil Ro feels towards Seo Won as he hides his identity in the drama.

Listen to Joo Won's new song below as we round out the OST releases of the Weds-Thurs dramas for tonight!