Jeff

Jeff is part of EPEX, the C9 Entertainment boy group that has kept its youth narrative unusually coherent across multiple releases instead of resetting the concept every comeback. He debuted with the group on June 8, 2021 under C9 Entertainment, and his page matters because the group's current identity is tied less to one viral moment than to the long arc from the BIPOLAR launch into the closing Youth : Epilogue chapter.

That makes Jeff relevant on HITKULTR beyond simple member indexing. EPEX has spent the last two years sharpening a story-driven catalog, and Jeff sits inside the section of that run where the music and branding finally feel locked in. The official group channels, the Japanese fan-club rollout, and the 2026 comeback framing all point in the same direction. This is a member page attached to an active group with continuity, not a dormant trainee-era stub.