Yoo Gun-Hyung was introduced to the world of K-pop in 1996 as one-half (along with Suh Jung-Hwan) of the Korean hip hop duo Untitle.
Yoo and Suh were both still in high school, and gained particular recognition in the Korean music industry because they were already writing their own songs.
[7] It has also been reported that Yoo and former Untitle co-member Suh have been working with Jang Woo Hyuk (formerly of H.O.T.)
"Gangnam Style", the lead single of PSY 6 (Six Rules), Part 1, which Yoo co-wrote with PSY, was released on July 15, 2012, and the music video was uploaded to YouTube the same day.
[10] Yoo Gun Hyung's current career is centered around Psy and the singers of P NATION.
(어땠을까)," "Blue Frog" (청개구리) and "Never Say Goodbye" were all co-written and arranged by Psy Yoo Gun-hyung.