Key 10th Memorial Fes Anniversary CD is remix album released on February 28, 2009 in Japan by Key Sounds Label bearing the catalog numbers KSLC-0004—0005. It was released at Key 10th Memorial Fes, an event hosted by the visual novel development brand Key under VisualArt's and held during February 28 and March 1, 2009 to commemorate the tenth anniversary of the game brand's establishment.