at the 90th National sports opening ceremony 2009-10-27 TBS Unison concert 2009-11-04 "Chu" digitally released. 2009-11-08 f(x) at LG WORLD CUP CHAMPION MINI Concert with Girls' Generation 2009-11-15 f(x)'s first Autograph session. 2009-11-20 f(x) K-SWISS CF was released. 2009-11-23 on 22nd Amber、Sulli、Krystal got cold but was diagnosed with H1N1 on 23rd. 2009-11-30