
This story is from Hallyu Dorama, your K-drama guide from the Philippines. See the original here: https://www.hallyudorama.com/yechan-omega-x-hyungseo-classy-duet-up-and-down
Yechan, the youngest member of K-pop boy group OMEGA X and its sub-unit OX:N, has teamed up with Hyungseo of girl group CLASS:y for a new duet single, “들었다놨다 (Up and Down).”
The track was produced by CIELOGROOVE, a production and songwriting team known for working with artists such as Kim Jae-joong, WEi, and BAE173, as well as for contributing to survival programs like “Peak Time” on JTBC and “SCOOL” on SBS M/SBS FiL.
“It feels quite nervous to release my first duet track with a female artist! For this project, I tried my best to highlight a softer voice than the energetic one which I’m more used to, and I’m glad to hear that my voice carried the emotions of the song well,” Yechan shared.
“들었다놨다 (Up and Down)” blends acoustic guitar rhythms with a smooth melody, capturing the thrill of falling in love while playfully tugging at emotions. The song highlights Yechan and Hyungseo’s soft yet refreshing vocal chemistry, adding to its romantic charm.
This marks CIELOGROOVE’s second duet project of 2025, following “좋아한다 말할래 (I Wanna Say I Love You),” a collaboration between Song Sun of TRI.BE and GK released in April.
The release also comes shortly after Yechan’s debut as part of OX:N, OMEGA X’s first sub-unit, on June 20, 2025. OX:N will be holding their first fan meeting, “INTO:N,” in Tokyo on September 10 and 11, following events in Korea, Shanghai, and Macau.
Meanwhile, Kevin, another member of OMEGA X, has officially debuted as an actor in the new BL drama “My Bias Is Showing!”
OMEGA X is an 11-member K-pop boy group under IPQ. Its members are Jaehan, Hwichan, Sebin, Hangyeom, Taedong, Xen, Jehyun, Kevin, Junghoon, Hyuk, and Yechan. The name combines the Greek letter Omega (Ω), symbolizing “the end,” and the letter X, representing the “unknown” with infinite possibilities. Together, it reflects the group’s ambition to become the “last boss” of K-pop while embracing constant growth.
This article was written with the help of AI, based on a press release from Helix Publicity, distributed via EIN Presswire, and was reviewed and edited by the Hallyu Dorama team.