Choi Yonghun (최용훈; or simply Yonghun) is a South Korean rapper under A.CONIC. He is a member of the upcoming boy group WOW and is a former member of the sub-unit T.E.N.
On January 11, 2018, a Makestar project was created in collaboration with Ideal Media Group to debut the sub-unit T.E.N with Yonghun as one of the members. He officially made his debut in the sub-unit on May 16, 2018 with the single album "해요해요".
On October 25, Yonghun was introduced as a contestant of Under Nineteen with his moving poster. The poster revealed that he was a part of the rap team. He was eliminated in the sixth episode after achieving 15th place in the rap team.
On September 22, 2020, he was revealed to be a part of A.CONIC's upcoming seven-member boy group WOW.