Uhm Jung-hwa
Ahn's professional career began with his debut in the K-pop industry as a rapper for singer Uhm Jung-hwa. He was also part of a mixed-gender project group along with his friend Son Ho-young, Shoo and Kim Hwan-sung but it fell through; Kim was later recruited as the final member of NRG and Shoo joined S.M. Entertainment where she would debut as part of girl group S.E.S..