SF9 is marking a decade since their debut with a full comeback package. On August 26 at 6 p.m. KST, the group releases their second full-length album "TENACITY" alongside the music video for title track "Without Wings."

The new single carries a message of resilience. "Without Wings" tells the story of SF9 breaking past their own limitations and taking flight again. The choreography reinforces that theme, embodying the idea that "even without wings, you can fly again"—a statement about the group's determination to overcome obstacles and reach new heights.

SF9 has been building momentum ahead of the release with a full teaser rollout. On August 11, the group shared group and individual concept photos under the "LIGHTEN" theme, celebrating the milestone anniversary (which arrives this October). Earlier materials included the "INTEND" concept photos, a trailer film, a track list, a listening guide, an album sampler, and a music video teaser for "Without Wings."

The album and comeback arrive as SF9 continues their career ten years after their initial debut. The group has positioned "TENACITY" as a statement piece for this chapter, with the concept photos and supporting materials framing the release as both a celebration and a declaration of intent moving forward.