Rookie group�F.I.X kicked off their 'Music Bank' debut with a strong performance of "Please Don't Say". The vocal quartet poured their emotions into their performance, leaving the audience spell-bound with their rich ballad. F.I.X. drew a lot of interest both local and international, thanks to the cameo Super Junior's Eunhyuk made in their music video, which you can watch here. In the meantime, check out their performance below: