Noh Seung-hwan is a South Korean hip-hop performer who rose to fame under the professional alias Sean. He is widely recognized as being one of the pioneers of Korean hip-hop and co-founded the duo Jinusean. Noh Seung-hwan is a South Korean hip-hop performer who rose to fame under the professional alias Sean. He is widely recognized as being one of the pioneers of Korean hip-hop and co-founded the duo Jinusean.