K-ON!! Original Soundtrack Vol. 2 (「けいおん!!」 オリジナルサウンドトラック(おりじなるさうんどとらっく) 2 K-ON!! Original Soundtrack Vol. 2) is the second "Original Soundtrack" (OST) of the second season of the anime K-ON!. The album contains 18 instrumental songs and two (Fude Pen ~Ball Pen~ (YuiAzu Ver.) and Sakuragaoka Joshi Koutou Gakkou Kouka) with vocals, sung by the voice actresses of the main characters: Aki Toyosaki (the voice actress of Yui Hirasawa), Yōko Hikasa (Mio Akiyama), Satomi Satō (Ritsu Tainaka), Minako Kotobuki (Tsumugi Kotobuki), and Ayana Taketatsu (Azusa Nakano). The songs are used as background music during second season of the anime. The album was released on 6 October 2010 in Japan by Pony Canyon.