UX1

UX1 is the fourth subunit of the boy group U-KISS. They debuted on November 26, 2025, with the digital single “Halo.” On November 1, 2025, U-KISS members Kevin Woo, Hoon, and Kiseop announced the formation of UX1 and revealed plans to hold concerts in Japan. On November 7, the subunit confirmed the release of their debut digital single, “Halo,” which was released on November 26. On November 28, UX1 announced their first special single, “Winterland,” which was released on December 4, 2025.