Koo Bon Hyuk, known simply as Hyuk, is a South Korean singer, dancer and member of TEMPEST (템페스트). He graduated from Neulpureun High School. Before debuting, he had a brief traineeship at DSP Media during that time where he met future fellow groupmate Hwarang, who was also a trainee at the same company. He then joined Yuehua Entertainment (위에화엔터테인먼트코리아) and made his debut in March 2022 as TEMPEST's main vocalist with the mini-album "It's Me, It's We". They debuted in Japan in April 2024 with the mini-album "Bang!".

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