K-On! (2009) (tv show): K-ON is about 5 high school girls who become friends through the Light Music Club. Yui the lead guitarist, Tsumugi the keyboardist, Mio the bassist, Azusa the rhythm guitarist, and Ritsu the drummer. K-ON is the story of 5 aspirin... Discover the latest Discussions, Reviews, Quotes, Theories, Explanations and Analysis of K-On! (2009) below