Hwang Sang Hoon was a member of South Korean boy band Black Beat (블랙 비트), which debuted in 2000 under SM Entertainment. Since the group's disbandment in 2006, Hwang remains at SM as a performance director and choreographer. Some of his notable choreography works include Super Junior's "Sorry Sorry," SHINee's "Lucifer" and EXO's "Growl." (Source: channel-korea.com, Namu Wiki) Watch drama online for free.