Released on , undergrOund idOl #1 marks the debut of YooJung (OnlyOneOf) as a soloist. It serves as the opening chapter of the "undergrOund idOl" project, a series designed to showcase the individual colors and inner reflections of each OnlyOneOf member. 💿 The Solo Concept
The single album features two distinct tracks that highlight YooJung’s vocal range and the group's signature sound: YooJung (OnlyOneOf) UndergrOund IdOl #1 zip
The project focuses on the "hidden" or "underground" feelings of idols who typically shine in the spotlight. Released on , undergrOund idOl #1 marks the