Seo Sung Hyuk (서성혁) is a South Korean singer signed under Think About Entertainment. He participated in Mnet's survival show Produce 101 Season 2. He is a former member of the project group RAINZ. In 2021 he participated in Wild Idol and ranked 4th becoming a member of TAN. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.