EPEX released their seventh mini album Youth : Epilogue on June 9, 2026, led by the title track "ECHO." Built on minimalist, early-2000s-inspired pop with rhythmic grooves and dynamic rap, the song carries a message of self-belief, framed by the group as a follow-up to their debut track "Lock Down." The EP closes the Youth trilogy the group began in 2024, moving from adolescence toward a more grounded confidence. Its B-sides include "BETTER DAYS," "BOYS IN THE BAND," and "Call It Love."
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EPEX is a South Korean boy group formed and managed by C9 Entertainment. The group made its debut on June 8, 2021, with the extended play Bipolar Pt.1: Prelude of Anxiety, and is composed of Wish, Mu, A-Min, Baekseung, Ayden, Yewang, and Jeff, who perform across vocal, rap, and dance roles. Its music spans K-pop, hip-hop, and dance styles, and its discography has been structured into thematic series that follow a continuing narrative. The group's early releases formed the Bipolar series in 2021, followed by the Prelude of Love series across 2022 and 2023, and the Youth series beginning in 2024 with its first full-length album, Youth Chapter 1: Youth Days. Known for performance-oriented title tracks and conceptual storytelling across its releases, EPEX has built its identity through successive extended plays and singles. The group belongs to the wave of fourth-generation K-pop acts that emerged in the early 2020s.