SF9, a group under Cube Entertainment, held a showcase for their second regular album 'TENACITY' on the afternoon of the 26th at Cube Convention Center in Mapo-gu, Seoul. The album 'TENACITY,' which means perseverance, determination, and indomitable will, marks SF9's 10th debut anniversary with special significance. The title track 'Without Wings' encapsulates the group's determination to rise again despite facing various challenges. Through this track, fans can anticipate SF9's musical growth as they reflect on their 10-year journey while moving forward.