Underground Idol (stylized as undergrOund idOl) was a music project by the members of OnlyOneOf.
The projects goal was to explore the inner world of idols who will shine on stage for their fans.
Releases[]
| # | Title | Member | Release date |
|---|---|---|---|
| 1 | "Underground Idol #1" | YooJung | June 27, 2022 |
| 2 | "Underground Idol #2" | KB | July 26, 2022 |
| 3 | "Underground Idol #3" | JunJi | August 25, 2022 |
| 4 | "Underground Idol #4" | Rie | October 26, 2022 |
| 5 | "Underground Idol #5" | Mill | November 28, 2022 |
| 6 | "Underground Idol #6" | Nine | January 4, 2023 |