B:eta

In January 2013, Hayong was introduced as a member of the boy group AlphaBAT. On October 21, Simtong Entertainment, in partnership with BOY London, revealed the members’ new stage names corresponding to the Greek alphabet, with Hayong adopting the stage name B:eta. He officially debuted as a member of AlphaBAT on November 12 with the digital single "AB City.

" In December 2022, he debuted as part of the duo Cruffin with the digital single "My Christmas". On June 13, 2025, he made his solo debut with the digital single "너라는 계절".