K-On! is ... A group of five high school girls who are good friends revive the school's light-music club, and even plays on the school cultural festival live. Focuses on everyday life. Serialized in 2007-12. In 2009, 10 TV animation onaired. The number of BD sold exceeds 500,000, and it is the best-selling Japanese TV animation. The OP jump (Kirara jump) also started from here. Since 2018, the sequel "K-ON! Shuffle" is being serialized. With new characters and new high school, the timeline begins when Yui is in the first grade. Watch the live performance of Yui and friends and start the another light music club. Released in 2007.