Ahn Hyung Sub is a South Korean singer, dancer, former member of HYEONGSEOP X EUIWOONG (형섭x의웅) and current member of TEMPEST (템페스트). He graduated from Daeji High School and later obtained a bachelor's degree in Broadcasting Entertainment from Global Cyber University.
He joined Yuehua Entertainment (위에화엔터테인먼트코리아) in 2017 and represented the company in the second season of survival show "Produce 101", but was eliminated in the finals. Afterwards, he joined Lee Eui Woong (now known professionally as LEW) and formed the duo Hyeongseop X Euiwoong. They debuted in November 2017 with the single, "It Will Be Good". Unfortunately, they did not promote as much and officially disbanded in August 2021.
He then re-debuted in March 2022 as TEMPEST's vocalist and dancer with their first EP, “It's Me, It's We". They debuted in Japan in April 2024 with the mini-album "Bang!".