K-pop group SF9 released their second studio album 'TENACITY' on October 26th evening to commemorate their 10th debut anniversary since their 2016 debut with 'Feeling Sensation.' The group held a showcase at Cube Convention Center in Mapo-gu, Seoul at 2 PM the same day, unveiling new songs for the first time. The album title 'TENACITY' means 'perseverance, tenacity, and indomitable will' while symbolizing their 10 years (TEN) since debut. The album contains stories of reflecting on their 10-year musical journey and moving forward. SF9 stated they put in "120% passion" and expressed gratitude to fans whose support made their 10th anniversary possible. Members credited their longevity as a group to having well-matched hearts and shared ultimate goals, expressing aspirations to continue until their 60th anniversary.