Wonder About Us! Hello, I'm Yongha! Yoo Yong Ha (유용하; or simply Yongha) is a South Korean rapper and singer under OUI Entertainment. He is the leader of the project boy group 1THE9 and a member of the trainee group OUIBOYS.
On October 25, 2018, Yoo Yong Ha 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 finished in sixth place, thus becoming a member of the project group 1THE9.