Byun Woo-seok, you've secured your rights by joining the Eumsilyeon.

Byun Woo-seok became a member of the Musicians' Union after singing a song that even made it onto the Billboard charts as a drama soundtrack.
It's really great that I can receive royalties and compensation for the songs I sing in the drama.
I think we've entered an era where actors are properly recognized for their music rights.
As a fan, I will continue to support you and look forward to your activities.