Kim Rock Hyun, better known by his stage name Rockhyun, is the main vocalist and dancer of the boy band 100% that debuted debuted on September 21, 2012. He previously was a member of the duo Jumper (2009).
He enlisted in the military on July 15, 2019.
The group officially ended their activities and disbanded on October 9, 2021, when their contract with TOP Media expired.
The four former members of 100%, Chanyong, Rockhyun, Hyukjin, and Jonghwan have since reunited to form pre-debut team FAVE1.
