K-pop boy band SF9 marks its 10th anniversary this year, but the eight-piece is measuring its career in a much longer unit: 60 more years, by the group's own reckoning, health permitting. The FNC Entertainment act returned Wednesday with "TENACITY," its second full-length album, led by the single "Without Wings," coming back to the scene with a decade's worth of added experience behind it. "We plan to keep this going for another 60 years or so, and we're a group with the will and the nerve to do it," Inseong said at a media showcase in Seoul, Wednesday afternoon. "As long as we stay healthy, it's possible." SF9 debuted in October 2016 with the single album "Feeling Sensation" and opened its 10th year in March with the special album "About Love." Wednesday's release caps off that run, with 10 tracks spanning a range of genres. The group, now made up of Youngbin, Inseong, Jaeyoon, Dawon, Zuho, Yoo Tae-yang, Hwiyoung and Chani, held the press event at Cube Convention Center in Seoul's Mapo District hours ahead of the release, performing the new song for the first time and reflecting on the