Sakura Kou Keionbu / Houkago Tea Time
The Sakura Kou Keionbu released many CDs as part of the K-On anime, and they all placed very highly in the Oricon Daily Album and Singles rankings.
The first four girls cosplayed as their K-On characters in the May 2009 issue of Newtype magazine.
They decided to call themselves Houkago Tea Time (Êü²Ý¸å¥Æ¥£¡¼¥¿¥¤¥à), and have been using that name in later CD releases.
They appeared in several live events as the group from the anime, and even performed as a band. The biggest event was the "K-On! Live Let's Go" that took place on December 30, 2009. A DVD and Bluray Disc containing all of the songs from this event has been released.
There were signed panels for the K-On x Ice no Mi campaign at Akihabara Station in December 2012.