K-On. is a Japanese four-panel comic strip seinen manga written and illustrated by Kakifly. The manga was serialized in Houbunshas seinen manga magazine Manga Time Kirara between the May 2007 and October 2010 issues and it was also serialized in Houbunshas magazine Manga Time Kirara Carat. The manga relaunched from April 2011 to June 2012 with two separate storylines published in Manga Time Kirara and Manga Time Kirara Carat, the manga is licensed in North America by Yen Press. A 13-episode anime adaptation produced by Kyoto Animation aired in Japan between April and June 2009, an additional original video animation episode was released in January 2010. A 26-episode second season, titled K-On, aired in Japan between April and September 2010, with an OVA episode released in March 2011. An animated film based on the series was released in Japan on December 3,2011, Bandai Entertainment had licensed the first season until their closure in 2012. Sentai Filmworks has since re-licensed the first season, in addition to acquiring the rights for the second season, the title of the series comes from the Japanese word for light music, keiongaku, which in the Japanese context is similar to pop music. K-On. has achieved sales in Japan, and by 2011 gross revenues had reached over 15 billion yen. In K-On. in a part of Japan, four Japanese high school girls join the light music club of the all-girls private Sakuragaoka High School to try to save it from being disbanded. However, they are the members of the club. At first, Yui Hirasawa has no experience playing musical instruments or reading sheet music, from then on, Yui, along with bassist Mio Akiyama, drummer Ritsu Tainaka, and keyboardist Tsumugi Kotobuki spend their school days practicing, performing, and hanging out together. The club is overseen by music teacher Sawako Yamanaka who eventually becomes their homeroom teacher as well during their year of high school. In their second year, the club welcomes another guitarist, underclassman Azusa Nakano, after Azusa joins they gain more structure and begin to practice more. After their third year, Yui, Mio, Ritsu and Tsumugi graduate, there they join its light music club alongside three other students, Akira Wada, Ayame Yoshida, and Sachi Hayashi. Meanwhile, Azusa continues to run the high school music club alongside Yuis sister Ui, their classmate Jun Suzuki. Yui Hirasawa Voiced by, Aki Toyosaki, Stephanie Sheh Yui is the main protagonist of the series and she is one of the members of the light music club and plays a Heritage Cherry Sunburst Gibson Les Paul Standard electric guitar that she nicknames Gīta. She does not get good grades in school and is distracted by trivialities. Yui is clumsy and easily spaces out most of the time and she can be forgetful and is sometimes oblivious to the situation around her
Cover to K-On! manga volume 1 featuring Yui Hirasawa.
The room at the Toyosato Elementary School that served as the model for the room used by the Light Music Club in the anime. Fans have decorated the room with the items shown in the anime.